[{"language":[{"iso":"eng"}],"extern":"1","keyword":["Physics and Astronomy (miscellaneous)","General Materials Science"],"article_type":"original","article_number":"024420","user_id":"22501","_id":"47993","status":"public","abstract":[{"text":"Structural strain severely impacts material properties, such as the linear and nonlinear optical response. Moreover, strain plays a key role, e.g., in the physics of ferroelectrics and, in particular, of their domain walls. μ-Raman spectroscopy is a well-suited technique for the investigation of such strain effects as it allows to measure the lattice dynamics locally. However, quantifying and reconstructing strain fields from Raman maps requires knowledge on the strain dependence of phonon frequencies. In this paper, we have analyzed both theoretically and experimentally the phonon frequencies in the widely used ferroelectrics lithium niobate and lithium tantalate as a function of uniaxial strain via density functional theory and μ-Raman spectroscopy. Overall, we find a good agreement between our ab initio models and the experimental data performed with a stress cell. The majority of phonons show an increase in frequency under compressive strain, whereas the opposite is observed for tensile strains. Moreover, for E-type phonons, we observe the lifting of degeneracy already at moderate strain fields (i.e., at ±0.2%) along the x and y directions. This paper, hence, allows for the systematic analysis of three-dimensional strains in modern-type bulk and thin-film devices assembled from lithium niobate and tantalate.","lang":"eng"}],"publication":"Physical Review Materials","type":"journal_article","doi":"10.1103/physrevmaterials.7.024420","title":"Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress","volume":7,"author":[{"last_name":"Singh","full_name":"Singh, Ekta","first_name":"Ekta"},{"first_name":"Mike N.","last_name":"Pionteck","full_name":"Pionteck, Mike N."},{"first_name":"Sven","last_name":"Reitzig","full_name":"Reitzig, Sven"},{"first_name":"Michael","full_name":"Lange, Michael","last_name":"Lange"},{"first_name":"Michael","id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"last_name":"Sanna","full_name":"Sanna, Simone","first_name":"Simone"}],"date_created":"2023-10-11T09:06:56Z","date_updated":"2023-10-11T09:08:16Z","publisher":"American Physical Society (APS)","intvolume":"         7","citation":{"mla":"Singh, Ekta, et al. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial Stress.” <i>Physical Review Materials</i>, vol. 7, no. 2, 024420, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>.","bibtex":"@article{Singh_Pionteck_Reitzig_Lange_Rüsing_Eng_Sanna_2023, title={Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>}, number={2024420}, journal={Physical Review Materials}, publisher={American Physical Society (APS)}, author={Singh, Ekta and Pionteck, Mike N. and Reitzig, Sven and Lange, Michael and Rüsing, Michael and Eng, Lukas M. and Sanna, Simone}, year={2023} }","short":"E. Singh, M.N. Pionteck, S. Reitzig, M. Lange, M. Rüsing, L.M. Eng, S. Sanna, Physical Review Materials 7 (2023).","apa":"Singh, E., Pionteck, M. N., Reitzig, S., Lange, M., Rüsing, M., Eng, L. M., &#38; Sanna, S. (2023). Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress. <i>Physical Review Materials</i>, <i>7</i>(2), Article 024420. <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">https://doi.org/10.1103/physrevmaterials.7.024420</a>","ieee":"E. Singh <i>et al.</i>, “Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress,” <i>Physical Review Materials</i>, vol. 7, no. 2, Art. no. 024420, 2023, doi: <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>.","chicago":"Singh, Ekta, Mike N. Pionteck, Sven Reitzig, Michael Lange, Michael Rüsing, Lukas M. Eng, and Simone Sanna. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial Stress.” <i>Physical Review Materials</i> 7, no. 2 (2023). <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">https://doi.org/10.1103/physrevmaterials.7.024420</a>.","ama":"Singh E, Pionteck MN, Reitzig S, et al. Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress. <i>Physical Review Materials</i>. 2023;7(2). doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>"},"year":"2023","issue":"2","quality_controlled":"1","publication_identifier":{"issn":["2475-9953"]},"publication_status":"published"},{"publication":"Journal of Applied Physics","abstract":[{"lang":"eng","text":"Coherent nonlinear optical μ-spectroscopy is a frequently used tool in modern material science as it is sensitive to many different local observables, which comprise, among others, crystal symmetry and vibrational properties. The richness in information, however, may come with challenges in data interpretation, as one has to disentangle the many different effects like multiple reflections, phase jumps at interfaces, or the influence of the Guoy-phase. In order to facilitate interpretation, the work presented here proposes an easy-to-use semi-analytical modeling Ansatz, which bases upon known analytical solutions using Gaussian beams. Specifically, we apply this Ansatz to compute nonlinear optical responses of (thin film) optical materials. We try to conserve the meaning of intuitive parameters like the Gouy-phase and the nonlinear coherent interaction length. In particular, the concept of coherence length is extended, which is a must when using focal beams. The model is subsequently applied to exemplary cases of second- and third-harmonic generation. We observe a very good agreement with experimental data, and furthermore, despite the constraints and limits of the analytical Ansatz, our model performs similarly well as when using more rigorous simulations. However, it outperforms the latter in terms of computational power, requiring more than three orders less computational time and less performant computer systems."}],"keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"quality_controlled":"1","issue":"12","year":"2023","publisher":"AIP Publishing","date_created":"2023-10-11T09:09:00Z","title":"Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach","type":"journal_article","status":"public","_id":"47994","user_id":"22501","article_type":"original","article_number":"123105","extern":"1","publication_identifier":{"issn":["0021-8979","1089-7550"]},"publication_status":"published","intvolume":"       133","citation":{"ieee":"K. J. Spychala, Z. H. Amber, L. M. Eng, and M. Rüsing, “Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach,” <i>Journal of Applied Physics</i>, vol. 133, no. 12, Art. no. 123105, 2023, doi: <a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>.","chicago":"Spychala, Kai J., Zeeshan H. Amber, Lukas M. Eng, and Michael Rüsing. “Modeling Nonlinear Optical Interactions of Focused Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” <i>Journal of Applied Physics</i> 133, no. 12 (2023). <a href=\"https://doi.org/10.1063/5.0136252\">https://doi.org/10.1063/5.0136252</a>.","ama":"Spychala KJ, Amber ZH, Eng LM, Rüsing M. Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach. <i>Journal of Applied Physics</i>. 2023;133(12). doi:<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>","bibtex":"@article{Spychala_Amber_Eng_Rüsing_2023, title={Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach}, volume={133}, DOI={<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>}, number={12123105}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Spychala, Kai J. and Amber, Zeeshan H. and Eng, Lukas M. and Rüsing, Michael}, year={2023} }","mla":"Spychala, Kai J., et al. “Modeling Nonlinear Optical Interactions of Focused Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” <i>Journal of Applied Physics</i>, vol. 133, no. 12, 123105, AIP Publishing, 2023, doi:<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>.","short":"K.J. Spychala, Z.H. Amber, L.M. Eng, M. Rüsing, Journal of Applied Physics 133 (2023).","apa":"Spychala, K. J., Amber, Z. H., Eng, L. M., &#38; Rüsing, M. (2023). Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach. <i>Journal of Applied Physics</i>, <i>133</i>(12), Article 123105. <a href=\"https://doi.org/10.1063/5.0136252\">https://doi.org/10.1063/5.0136252</a>"},"oa":"1","date_updated":"2023-10-11T16:10:54Z","volume":133,"author":[{"first_name":"Kai J.","full_name":"Spychala, Kai J.","last_name":"Spychala"},{"first_name":"Zeeshan H.","last_name":"Amber","full_name":"Amber, Zeeshan H."},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501","first_name":"Michael"}],"doi":"10.1063/5.0136252","main_file_link":[{"open_access":"1","url":" https://doi.org/10.1063/5.0136252"}]},{"language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy"],"department":[{"_id":"15"},{"_id":"230"}],"user_id":"14931","_id":"46573","status":"public","abstract":[{"text":"<jats:p>An ultra-fast change of the absorption onset for zincblende gallium-nitride (zb-GaN) (fundamental bandgap: 3.23 eV) is observed by investigating the imaginary part of the dielectric function using time-dependent femtosecond pump–probe spectroscopic ellipsometry between 2.9 and 3.7 eV. The 266 nm (4.66 eV) pump pulses induce a large electron–hole pair concentration up to 4×1020cm−3, which shift the transition energy between conduction and valence bands due to many-body effects up to ≈500 meV. Here, the absorption onset increases due to band filling while the bandgap renormalization at the same time decreases the bandgap. Additionally, the absorption of the pump-beam creates a free-carrier profile within the 605 nm zb-GaN layer with high free-carrier concentrations at the surface, and low concentrations at the interface to the substrate. This leads to varying optical properties from the sample surface (high transition energy) to substrate (low transition energy), which are taken into account by grading analysis for an accurate description of the experimental data. For this, a model describing the time- and position-dependent free-carrier concentration is formulated by considering the relaxation, recombination, and diffusion of those carriers. We provide a quantitative analysis of optical experimental data (ellipsometric angles Ψ and Δ) as well as a plot for the time-dependent change of the imaginary part of the dielectric function.</jats:p>","lang":"eng"}],"publication":"Journal of Applied Physics","type":"journal_article","doi":"10.1063/5.0153091","title":"Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function","volume":134,"author":[{"full_name":"Baron, Elias","last_name":"Baron","first_name":"Elias"},{"full_name":"Goldhahn, Rüdiger","last_name":"Goldhahn","first_name":"Rüdiger"},{"last_name":"Espinoza","full_name":"Espinoza, Shirly","first_name":"Shirly"},{"first_name":"Martin","full_name":"Zahradník, Martin","last_name":"Zahradník"},{"first_name":"Mateusz","last_name":"Rebarz","full_name":"Rebarz, Mateusz"},{"last_name":"Andreasson","full_name":"Andreasson, Jakob","first_name":"Jakob"},{"full_name":"Deppe, Michael","last_name":"Deppe","first_name":"Michael"},{"last_name":"As","orcid":"0000-0003-1121-3565","full_name":"As, Donat Josef","id":"14","first_name":"Donat Josef"},{"first_name":"Martin","full_name":"Feneberg, Martin","last_name":"Feneberg"}],"date_created":"2023-08-18T08:17:41Z","publisher":"AIP Publishing","date_updated":"2023-10-09T09:17:15Z","intvolume":"       134","citation":{"ama":"Baron E, Goldhahn R, Espinoza S, et al. Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function. <i>Journal of Applied Physics</i>. 2023;134(7). doi:<a href=\"https://doi.org/10.1063/5.0153091\">10.1063/5.0153091</a>","chicago":"Baron, Elias, Rüdiger Goldhahn, Shirly Espinoza, Martin Zahradník, Mateusz Rebarz, Jakob Andreasson, Michael Deppe, Donat Josef As, and Martin Feneberg. “Time-Resolved Pump–Probe Spectroscopic Ellipsometry of Cubic GaN. I. Determination of the Dielectric Function.” <i>Journal of Applied Physics</i> 134, no. 7 (2023). <a href=\"https://doi.org/10.1063/5.0153091\">https://doi.org/10.1063/5.0153091</a>.","ieee":"E. Baron <i>et al.</i>, “Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function,” <i>Journal of Applied Physics</i>, vol. 134, no. 7, 2023, doi: <a href=\"https://doi.org/10.1063/5.0153091\">10.1063/5.0153091</a>.","apa":"Baron, E., Goldhahn, R., Espinoza, S., Zahradník, M., Rebarz, M., Andreasson, J., Deppe, M., As, D. J., &#38; Feneberg, M. (2023). Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function. <i>Journal of Applied Physics</i>, <i>134</i>(7). <a href=\"https://doi.org/10.1063/5.0153091\">https://doi.org/10.1063/5.0153091</a>","bibtex":"@article{Baron_Goldhahn_Espinoza_Zahradník_Rebarz_Andreasson_Deppe_As_Feneberg_2023, title={Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function}, volume={134}, DOI={<a href=\"https://doi.org/10.1063/5.0153091\">10.1063/5.0153091</a>}, number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Baron, Elias and Goldhahn, Rüdiger and Espinoza, Shirly and Zahradník, Martin and Rebarz, Mateusz and Andreasson, Jakob and Deppe, Michael and As, Donat Josef and Feneberg, Martin}, year={2023} }","short":"E. Baron, R. Goldhahn, S. Espinoza, M. Zahradník, M. Rebarz, J. Andreasson, M. Deppe, D.J. As, M. Feneberg, Journal of Applied Physics 134 (2023).","mla":"Baron, Elias, et al. “Time-Resolved Pump–Probe Spectroscopic Ellipsometry of Cubic GaN. I. Determination of the Dielectric Function.” <i>Journal of Applied Physics</i>, vol. 134, no. 7, AIP Publishing, 2023, doi:<a href=\"https://doi.org/10.1063/5.0153091\">10.1063/5.0153091</a>."},"year":"2023","issue":"7","publication_identifier":{"issn":["0021-8979","1089-7550"]},"publication_status":"published"},{"main_file_link":[{"open_access":"1","url":"https://doi.org/10.3390/cryst13101423"}],"doi":"10.3390/cryst13101423","author":[{"first_name":"Sergej","full_name":"Neufeld, Sergej","last_name":"Neufeld"},{"first_name":"Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","full_name":"Gerstmann, Uwe","id":"171"},{"first_name":"Laura","id":"40300","full_name":"Padberg, Laura","last_name":"Padberg"},{"full_name":"Eigner, Christof","id":"13244","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof"},{"id":"53","full_name":"Berth, Gerhard","last_name":"Berth","first_name":"Gerhard"},{"full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn","first_name":"Christine"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero","first_name":"Wolf Gero"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"}],"volume":13,"oa":"1","date_updated":"2023-10-11T09:15:58Z","citation":{"apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., &#38; Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>, <i>13</i>(10), Article 1423. <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>","bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i>, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","ieee":"S. Neufeld <i>et al.</i>, “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” <i>Crystals</i>, vol. 13, no. 10, Art. no. 1423, 2023, doi: <a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i> 13, no. 10 (2023). <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>.","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>. 2023;13(10). doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>"},"intvolume":"        13","publication_status":"published","publication_identifier":{"issn":["2073-4352"]},"funded_apc":"1","article_number":"1423","user_id":"22501","department":[{"_id":"169"}],"project":[{"grant_number":"231447078","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"47997","status":"public","type":"journal_article","title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","date_created":"2023-10-11T09:10:53Z","publisher":"MDPI AG","year":"2023","issue":"10","quality_controlled":"1","language":[{"iso":"eng"}],"keyword":["Inorganic Chemistry","Condensed Matter Physics","General Materials Science","General Chemical Engineering"],"abstract":[{"text":"The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family.","lang":"eng"}],"publication":"Crystals"},{"user_id":"22501","_id":"47996","extern":"1","article_type":"original","type":"journal_article","status":"public","author":[{"full_name":"Bashir, Umar","last_name":"Bashir","first_name":"Umar"},{"first_name":"Klaus","full_name":"Böttcher, Klaus","last_name":"Böttcher"},{"last_name":"Klimm","full_name":"Klimm, Detlef","first_name":"Detlef"},{"first_name":"Steffen","last_name":"Ganschow","full_name":"Ganschow, Steffen"},{"first_name":"Felix","last_name":"Bernhardt","full_name":"Bernhardt, Felix"},{"full_name":"Sanna, Simone","last_name":"Sanna","first_name":"Simone"},{"id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","first_name":"Michael"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."},{"last_name":"Bickermann","full_name":"Bickermann, Matthias","first_name":"Matthias"}],"volume":613,"date_updated":"2023-10-11T09:10:36Z","doi":"10.1080/00150193.2023.2189842","publication_status":"published","publication_identifier":{"issn":["0015-0193","1563-5112"]},"citation":{"ama":"Bashir U, Böttcher K, Klimm D, et al. Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition. <i>Ferroelectrics</i>. 2023;613(1):250-262. doi:<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>","ieee":"U. Bashir <i>et al.</i>, “Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition,” <i>Ferroelectrics</i>, vol. 613, no. 1, pp. 250–262, 2023, doi: <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>.","chicago":"Bashir, Umar, Klaus Böttcher, Detlef Klimm, Steffen Ganschow, Felix Bernhardt, Simone Sanna, Michael Rüsing, Lukas M. Eng, and Matthias Bickermann. “Solid Solutions of Lithium Niobate and Lithium Tantalate: Crystal Growth and the Ferroelectric Transition.” <i>Ferroelectrics</i> 613, no. 1 (2023): 250–62. <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">https://doi.org/10.1080/00150193.2023.2189842</a>.","short":"U. Bashir, K. Böttcher, D. Klimm, S. Ganschow, F. Bernhardt, S. Sanna, M. Rüsing, L.M. Eng, M. Bickermann, Ferroelectrics 613 (2023) 250–262.","mla":"Bashir, Umar, et al. “Solid Solutions of Lithium Niobate and Lithium Tantalate: Crystal Growth and the Ferroelectric Transition.” <i>Ferroelectrics</i>, vol. 613, no. 1, Informa UK Limited, 2023, pp. 250–62, doi:<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>.","bibtex":"@article{Bashir_Böttcher_Klimm_Ganschow_Bernhardt_Sanna_Rüsing_Eng_Bickermann_2023, title={Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition}, volume={613}, DOI={<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>}, number={1}, journal={Ferroelectrics}, publisher={Informa UK Limited}, author={Bashir, Umar and Böttcher, Klaus and Klimm, Detlef and Ganschow, Steffen and Bernhardt, Felix and Sanna, Simone and Rüsing, Michael and Eng, Lukas M. and Bickermann, Matthias}, year={2023}, pages={250–262} }","apa":"Bashir, U., Böttcher, K., Klimm, D., Ganschow, S., Bernhardt, F., Sanna, S., Rüsing, M., Eng, L. M., &#38; Bickermann, M. (2023). Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition. <i>Ferroelectrics</i>, <i>613</i>(1), 250–262. <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">https://doi.org/10.1080/00150193.2023.2189842</a>"},"page":"250-262","intvolume":"       613","language":[{"iso":"eng"}],"keyword":["Condensed Matter Physics","Electronic","Optical and Magnetic Materials"],"publication":"Ferroelectrics","abstract":[{"lang":"eng","text":"Specific heat capacity measurements by differential scanning calorimetry (DSC) of single crystals of solid solutions of LiNbO3 and LiTaO3 are reported and compared with corresponding ab initio calculations, with the aim to investigate the variation of the ferroelectric Curie temperature as a function of composition. For this purpose, single crystals of these solid solutions were grown with Czochralski pulling along the c-axis. Elemental composition of Nb and Ta was investigated using XRF analysis, and small samples with homogeneous and well known composition were used for the DSC measurements. We observed that the ferroelectric Curie temperature decreases linearly with increasing Ta concentration in the LiNb1−x Tax O3 solid solution crystals. Furthermore, the ferroelectric transition width of a mixed crystal appears to be smaller, as compared to pure LiTaO3."}],"date_created":"2023-10-11T09:10:08Z","publisher":"Informa UK Limited","title":"Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition","issue":"1","quality_controlled":"1","year":"2023"},{"user_id":"42777","department":[{"_id":"288"},{"_id":"623"}],"_id":"48349","article_number":"34903","type":"journal_article","status":"public","author":[{"last_name":"Stefszky","full_name":"Stefszky, M.","first_name":"M."},{"last_name":"vom Bruch","full_name":"vom Bruch, F.","first_name":"F."},{"first_name":"M.","last_name":"Santandrea","full_name":"Santandrea, M."},{"last_name":"Ricken","full_name":"Ricken, R.","first_name":"R."},{"full_name":"Quiring, V.","last_name":"Quiring","first_name":"V."},{"full_name":"Eigner, C.","last_name":"Eigner","first_name":"C."},{"last_name":"Herrmann","full_name":"Herrmann, H","first_name":"H"},{"first_name":"C","full_name":"Silberhorn, C","last_name":"Silberhorn"}],"volume":31,"date_updated":"2023-11-02T09:26:42Z","doi":"10.1364/oe.498423","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"citation":{"apa":"Stefszky, M., vom Bruch, F., Santandrea, M., Ricken, R., Quiring, V., Eigner, C., Herrmann, H., &#38; Silberhorn, C. (2023). Lithium niobate waveguide squeezer with integrated cavity length stabilisation for network applications. <i>Optics Express</i>, <i>31</i>(21), Article 34903. <a href=\"https://doi.org/10.1364/oe.498423\">https://doi.org/10.1364/oe.498423</a>","bibtex":"@article{Stefszky_vom Bruch_Santandrea_Ricken_Quiring_Eigner_Herrmann_Silberhorn_2023, title={Lithium niobate waveguide squeezer with integrated cavity length stabilisation for network applications}, volume={31}, DOI={<a href=\"https://doi.org/10.1364/oe.498423\">10.1364/oe.498423</a>}, number={2134903}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Stefszky, M. and vom Bruch, F. and Santandrea, M. and Ricken, R. and Quiring, V. and Eigner, C. and Herrmann, H and Silberhorn, C}, year={2023} }","short":"M. Stefszky, F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner, H. Herrmann, C. Silberhorn, Optics Express 31 (2023).","mla":"Stefszky, M., et al. “Lithium Niobate Waveguide Squeezer with Integrated Cavity Length Stabilisation for Network Applications.” <i>Optics Express</i>, vol. 31, no. 21, 34903, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/oe.498423\">10.1364/oe.498423</a>.","ama":"Stefszky M, vom Bruch F, Santandrea M, et al. Lithium niobate waveguide squeezer with integrated cavity length stabilisation for network applications. <i>Optics Express</i>. 2023;31(21). doi:<a href=\"https://doi.org/10.1364/oe.498423\">10.1364/oe.498423</a>","chicago":"Stefszky, M., F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner, H Herrmann, and C Silberhorn. “Lithium Niobate Waveguide Squeezer with Integrated Cavity Length Stabilisation for Network Applications.” <i>Optics Express</i> 31, no. 21 (2023). <a href=\"https://doi.org/10.1364/oe.498423\">https://doi.org/10.1364/oe.498423</a>.","ieee":"M. Stefszky <i>et al.</i>, “Lithium niobate waveguide squeezer with integrated cavity length stabilisation for network applications,” <i>Optics Express</i>, vol. 31, no. 21, Art. no. 34903, 2023, doi: <a href=\"https://doi.org/10.1364/oe.498423\">10.1364/oe.498423</a>."},"intvolume":"        31","language":[{"iso":"eng"}],"keyword":["Atomic and Molecular Physics","and Optics"],"publication":"Optics Express","abstract":[{"lang":"eng","text":"<jats:p>We report a titanium indiffused waveguide resonator featuring an integrated electro-optic modulator for cavity length stabilisation that produces close to 5 dB of squeezed light at 1550 nm (2.4 dB directly measured). The resonator is locked on resonance for tens of minutes with 70 mW of SH light incident on the cavity, demonstrating that photorefraction can be mitigated. Squeezed light production concurrent with cavity length stabilisation utilising the integrated EOM is demonstrated. The device demonstrates the suitability of this platform for squeezed light generation in network applications, where stabilisation to the reference field is typically necessary.</jats:p>"}],"date_created":"2023-10-19T14:22:59Z","publisher":"Optica Publishing Group","title":"Lithium niobate waveguide squeezer with integrated cavity length stabilisation for network applications","issue":"21","year":"2023"},{"language":[{"iso":"eng"}],"keyword":["Electrical and Electronic Engineering","Atomic and Molecular Physics","and Optics"],"department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"user_id":"335","_id":"48464","status":"public","abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>Initial value problems can be solved efficiently by means of Runge–Kutta algorithms with adaptive step size control. Diagonally implicit Runge–Kutta (DIRK) methods are the most popular class among the diverse family of Runge–Kutta algorithms. In this paper, the novel class of low‐order explicit last‐stage diagonally implicit Runge–Kutta (ELDIRK) methods are explored, which combine implicit schemes with an additional explicit evaluation as an explicit last stage. ELDIRK Butcher tableaus are used to control embedded RK methods to obtain solutions of different orders. The lower‐order solution is obtained by classical implicit RK stages and the higher‐order solution is obtained by additional explicit evaluation. As a result, a significant reduction in computational cost is achieved by skipping the iterative solution of nonlinear systems for the additional step. The examination of the heat problem and the use of the innovative Butcher tableau in the finite‐element method are the main contributions of this work. Thus, it is possible to establish adaptive step size control for the new low‐order embedded methods based on an empirical method for error estimation. Two‐dimensional simulations are used to show an appropriate algorithm for the ELDIRK schemes. The new Runge–Kutta schemes' predictions of higher‐order convergence are confirmed, and their successful outcomes are illustrated.</jats:p>","lang":"eng"}],"publication":"PAMM","type":"journal_article","doi":"10.1002/pamm.202300071","title":"Numerical investigations of new low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element method","volume":23,"date_created":"2023-10-25T10:46:57Z","author":[{"first_name":"Hendrik","id":"60816","full_name":"Westermann, Hendrik","orcid":"0000-0002-5034-9708","last_name":"Westermann"},{"full_name":"Mahnken, Rolf","id":"335","last_name":"Mahnken","first_name":"Rolf"}],"date_updated":"2023-11-07T14:34:44Z","publisher":"Wiley","intvolume":"        23","citation":{"ieee":"H. Westermann and R. Mahnken, “Numerical investigations of new low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element method,” <i>PAMM</i>, vol. 23, no. 2, 2023, doi: <a href=\"https://doi.org/10.1002/pamm.202300071\">10.1002/pamm.202300071</a>.","chicago":"Westermann, Hendrik, and Rolf Mahnken. “Numerical Investigations of New Low‐order Explicit Last Stage Diagonal Implicit Runge–Kutta Schemes with the Finite‐element Method.” <i>PAMM</i> 23, no. 2 (2023). <a href=\"https://doi.org/10.1002/pamm.202300071\">https://doi.org/10.1002/pamm.202300071</a>.","ama":"Westermann H, Mahnken R. Numerical investigations of new low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element method. <i>PAMM</i>. 2023;23(2). doi:<a href=\"https://doi.org/10.1002/pamm.202300071\">10.1002/pamm.202300071</a>","bibtex":"@article{Westermann_Mahnken_2023, title={Numerical investigations of new low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element method}, volume={23}, DOI={<a href=\"https://doi.org/10.1002/pamm.202300071\">10.1002/pamm.202300071</a>}, number={2}, journal={PAMM}, publisher={Wiley}, author={Westermann, Hendrik and Mahnken, Rolf}, year={2023} }","short":"H. Westermann, R. Mahnken, PAMM 23 (2023).","mla":"Westermann, Hendrik, and Rolf Mahnken. “Numerical Investigations of New Low‐order Explicit Last Stage Diagonal Implicit Runge–Kutta Schemes with the Finite‐element Method.” <i>PAMM</i>, vol. 23, no. 2, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/pamm.202300071\">10.1002/pamm.202300071</a>.","apa":"Westermann, H., &#38; Mahnken, R. (2023). Numerical investigations of new low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element method. <i>PAMM</i>, <i>23</i>(2). <a href=\"https://doi.org/10.1002/pamm.202300071\">https://doi.org/10.1002/pamm.202300071</a>"},"year":"2023","issue":"2","quality_controlled":"1","publication_identifier":{"issn":["1617-7061","1617-7061"]},"publication_status":"published"},{"keyword":["Computer Science Applications","General Physics and Astronomy","Mechanical Engineering","Mechanics of Materials","Computational Mechanics"],"language":[{"iso":"eng"}],"publication":"Computer Methods in Applied Mechanics and Engineering","publisher":"Elsevier BV","date_created":"2023-10-25T10:47:23Z","title":"On the accuracy, stability and computational efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field problems","quality_controlled":"1","year":"2023","_id":"48465","user_id":"335","department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"article_number":"116545","type":"journal_article","status":"public","date_updated":"2023-11-07T14:34:56Z","author":[{"first_name":"Hendrik","id":"60816","full_name":"Westermann, Hendrik","last_name":"Westermann","orcid":"0000-0002-5034-9708"},{"full_name":"Mahnken, Rolf","id":"335","last_name":"Mahnken","first_name":"Rolf"}],"volume":418,"doi":"10.1016/j.cma.2023.116545","publication_status":"published","publication_identifier":{"issn":["0045-7825"]},"citation":{"ama":"Westermann H, Mahnken R. On the accuracy, stability and computational efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field problems. <i>Computer Methods in Applied Mechanics and Engineering</i>. 2023;418. doi:<a href=\"https://doi.org/10.1016/j.cma.2023.116545\">10.1016/j.cma.2023.116545</a>","ieee":"H. Westermann and R. Mahnken, “On the accuracy, stability and computational efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field problems,” <i>Computer Methods in Applied Mechanics and Engineering</i>, vol. 418, Art. no. 116545, 2023, doi: <a href=\"https://doi.org/10.1016/j.cma.2023.116545\">10.1016/j.cma.2023.116545</a>.","chicago":"Westermann, Hendrik, and Rolf Mahnken. “On the Accuracy, Stability and Computational Efficiency of Explicit Last-Stage Diagonally Implicit Runge–Kutta Methods (ELDIRK) for the Adaptive Solution of Phase-Field Problems.” <i>Computer Methods in Applied Mechanics and Engineering</i> 418 (2023). <a href=\"https://doi.org/10.1016/j.cma.2023.116545\">https://doi.org/10.1016/j.cma.2023.116545</a>.","apa":"Westermann, H., &#38; Mahnken, R. (2023). On the accuracy, stability and computational efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field problems. <i>Computer Methods in Applied Mechanics and Engineering</i>, <i>418</i>, Article 116545. <a href=\"https://doi.org/10.1016/j.cma.2023.116545\">https://doi.org/10.1016/j.cma.2023.116545</a>","mla":"Westermann, Hendrik, and Rolf Mahnken. “On the Accuracy, Stability and Computational Efficiency of Explicit Last-Stage Diagonally Implicit Runge–Kutta Methods (ELDIRK) for the Adaptive Solution of Phase-Field Problems.” <i>Computer Methods in Applied Mechanics and Engineering</i>, vol. 418, 116545, Elsevier BV, 2023, doi:<a href=\"https://doi.org/10.1016/j.cma.2023.116545\">10.1016/j.cma.2023.116545</a>.","short":"H. Westermann, R. Mahnken, Computer Methods in Applied Mechanics and Engineering 418 (2023).","bibtex":"@article{Westermann_Mahnken_2023, title={On the accuracy, stability and computational efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field problems}, volume={418}, DOI={<a href=\"https://doi.org/10.1016/j.cma.2023.116545\">10.1016/j.cma.2023.116545</a>}, number={116545}, journal={Computer Methods in Applied Mechanics and Engineering}, publisher={Elsevier BV}, author={Westermann, Hendrik and Mahnken, Rolf}, year={2023} }"},"intvolume":"       418"},{"keyword":["Physical and Theoretical Chemistry","General Physics and Astronomy"],"language":[{"iso":"eng"}],"abstract":[{"text":"The seven parallel dissociative ionization channels of benzonitrile yield highly stable fragment ions with commensurate abundance, underlining the potential role of the benzonitrile cation as hub species in the interstellar medium.","lang":"eng"}],"publication":"Physical Chemistry Chemical Physics","title":"Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile","publisher":"Royal Society of Chemistry (RSC)","date_created":"2023-11-07T07:24:53Z","year":"2023","quality_controlled":"1","issue":"42","article_type":"original","_id":"48639","user_id":"98339","department":[{"_id":"728"}],"status":"public","type":"journal_article","doi":"10.1039/d3cp03977c","date_updated":"2023-11-13T08:00:52Z","author":[{"full_name":"Kamer, Jerry","last_name":"Kamer","first_name":"Jerry"},{"last_name":"Schleier","full_name":"Schleier, Domenik","id":"98339","first_name":"Domenik"},{"full_name":"Donker, Merel","last_name":"Donker","first_name":"Merel"},{"first_name":"Patrick","full_name":"Hemberger, Patrick","last_name":"Hemberger"},{"first_name":"Andras","last_name":"Bodi","full_name":"Bodi, Andras"},{"full_name":"Bouwman, Jordy","last_name":"Bouwman","first_name":"Jordy"}],"volume":25,"citation":{"ama":"Kamer J, Schleier D, Donker M, Hemberger P, Bodi A, Bouwman J. Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile. <i>Physical Chemistry Chemical Physics</i>. 2023;25(42):29070-29079. doi:<a href=\"https://doi.org/10.1039/d3cp03977c\">10.1039/d3cp03977c</a>","chicago":"Kamer, Jerry, Domenik Schleier, Merel Donker, Patrick Hemberger, Andras Bodi, and Jordy Bouwman. “Threshold Photoelectron Spectroscopy and Dissociative Photoionization of Benzonitrile.” <i>Physical Chemistry Chemical Physics</i> 25, no. 42 (2023): 29070–79. <a href=\"https://doi.org/10.1039/d3cp03977c\">https://doi.org/10.1039/d3cp03977c</a>.","ieee":"J. Kamer, D. Schleier, M. Donker, P. Hemberger, A. Bodi, and J. Bouwman, “Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile,” <i>Physical Chemistry Chemical Physics</i>, vol. 25, no. 42, pp. 29070–29079, 2023, doi: <a href=\"https://doi.org/10.1039/d3cp03977c\">10.1039/d3cp03977c</a>.","bibtex":"@article{Kamer_Schleier_Donker_Hemberger_Bodi_Bouwman_2023, title={Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile}, volume={25}, DOI={<a href=\"https://doi.org/10.1039/d3cp03977c\">10.1039/d3cp03977c</a>}, number={42}, journal={Physical Chemistry Chemical Physics}, publisher={Royal Society of Chemistry (RSC)}, author={Kamer, Jerry and Schleier, Domenik and Donker, Merel and Hemberger, Patrick and Bodi, Andras and Bouwman, Jordy}, year={2023}, pages={29070–29079} }","short":"J. Kamer, D. Schleier, M. Donker, P. Hemberger, A. Bodi, J. Bouwman, Physical Chemistry Chemical Physics 25 (2023) 29070–29079.","mla":"Kamer, Jerry, et al. “Threshold Photoelectron Spectroscopy and Dissociative Photoionization of Benzonitrile.” <i>Physical Chemistry Chemical Physics</i>, vol. 25, no. 42, Royal Society of Chemistry (RSC), 2023, pp. 29070–79, doi:<a href=\"https://doi.org/10.1039/d3cp03977c\">10.1039/d3cp03977c</a>.","apa":"Kamer, J., Schleier, D., Donker, M., Hemberger, P., Bodi, A., &#38; Bouwman, J. (2023). Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile. <i>Physical Chemistry Chemical Physics</i>, <i>25</i>(42), 29070–29079. <a href=\"https://doi.org/10.1039/d3cp03977c\">https://doi.org/10.1039/d3cp03977c</a>"},"page":"29070-29079","intvolume":"        25","publication_status":"published","publication_identifier":{"issn":["1463-9076","1463-9084"]}},{"user_id":"48411","department":[{"_id":"9"},{"_id":"158"}],"_id":"49107","article_number":"1592","type":"journal_article","status":"public","author":[{"full_name":"Pramanik, Sudipta","last_name":"Pramanik","first_name":"Sudipta"},{"full_name":"Milaege, Dennis","last_name":"Milaege","first_name":"Dennis"},{"id":"52771","full_name":"Hein, Maxwell","orcid":"0000-0002-3732-2236","last_name":"Hein","first_name":"Maxwell"},{"last_name":"Hoyer","full_name":"Hoyer, Kay-Peter","id":"48411","first_name":"Kay-Peter"},{"last_name":"Schaper","id":"43720","full_name":"Schaper, Mirko","first_name":"Mirko"}],"volume":13,"date_updated":"2023-11-21T15:30:57Z","doi":"10.3390/cryst13111592","publication_status":"published","publication_identifier":{"issn":["2073-4352"]},"citation":{"ieee":"S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, and M. Schaper, “Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach,” <i>Crystals</i>, vol. 13, no. 11, Art. no. 1592, 2023, doi: <a href=\"https://doi.org/10.3390/cryst13111592\">10.3390/cryst13111592</a>.","chicago":"Pramanik, Sudipta, Dennis Milaege, Maxwell Hein, Kay-Peter Hoyer, and Mirko Schaper. “Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach.” <i>Crystals</i> 13, no. 11 (2023). <a href=\"https://doi.org/10.3390/cryst13111592\">https://doi.org/10.3390/cryst13111592</a>.","ama":"Pramanik S, Milaege D, Hein M, Hoyer K-P, Schaper M. Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach. <i>Crystals</i>. 2023;13(11). doi:<a href=\"https://doi.org/10.3390/cryst13111592\">10.3390/cryst13111592</a>","short":"S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, M. Schaper, Crystals 13 (2023).","mla":"Pramanik, Sudipta, et al. “Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach.” <i>Crystals</i>, vol. 13, no. 11, 1592, MDPI AG, 2023, doi:<a href=\"https://doi.org/10.3390/cryst13111592\">10.3390/cryst13111592</a>.","bibtex":"@article{Pramanik_Milaege_Hein_Hoyer_Schaper_2023, title={Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/cryst13111592\">10.3390/cryst13111592</a>}, number={111592}, journal={Crystals}, publisher={MDPI AG}, author={Pramanik, Sudipta and Milaege, Dennis and Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko}, year={2023} }","apa":"Pramanik, S., Milaege, D., Hein, M., Hoyer, K.-P., &#38; Schaper, M. (2023). Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach. <i>Crystals</i>, <i>13</i>(11), Article 1592. <a href=\"https://doi.org/10.3390/cryst13111592\">https://doi.org/10.3390/cryst13111592</a>"},"intvolume":"        13","language":[{"iso":"eng"}],"keyword":["Inorganic Chemistry","Condensed Matter Physics","General Materials Science","General Chemical Engineering"],"publication":"Crystals","abstract":[{"text":"<jats:p>The effect of plaque deposition (atherosclerosis) on blood flow behaviour is investigated via computational fluid dynamics and structural mechanics simulations. To mitigate the narrowing of coronary artery atherosclerosis (stenosis), the computational modelling of auxetic and non-auxetic stents was performed in this study to minimise or even avoid these deposition agents in the future. Computational modelling was performed in unrestricted (open) conditions and restricted (in an artery) conditions. Finally, stent designs were produced by additive manufacturing, and mechanical testing of the stents was undertaken. Auxetic stent 1 and auxetic stent 2 exhibit very little foreshortening and radial recoil in unrestricted deployment conditions compared to non-auxetic stent 3. However, stent 2 shows structural instability (strut failure) during unrestricted deployment conditions. For the restricted deployment condition, stent 1 shows a higher radial recoil compared to stent 3. In the tensile test simulations, short elongation for stent 1 due to strut failure is demonstrated, whereas no structural instability is noticed for stent 2 and stent 3 until 0.5 (mm/mm) strain. The as-built samples show a significant thickening of the struts of the stents resulting in short elongations during tensile testing compared to the simulations (stent 2 and stent 3). A modelling framework for the stent deployment system that enables the selection of appropriate stent designs before in vivo testing is required. This leads to the acceleration of the development process and a reduction in time, resulting in less material wastage. The modelling framework shall be useful for doctors designing patient-specific stents.</jats:p>","lang":"eng"}],"date_created":"2023-11-21T15:29:49Z","publisher":"MDPI AG","title":"Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling Approach","issue":"11","quality_controlled":"1","year":"2023"},{"type":"journal_article","publication":"Physical Review Research","status":"public","user_id":"60286","department":[{"_id":"15"},{"_id":"170"},{"_id":"230"},{"_id":"569"},{"_id":"429"}],"_id":"49117","language":[{"iso":"eng"}],"article_number":"043158","keyword":["General Physics and Astronomy"],"issue":"4","publication_status":"published","publication_identifier":{"issn":["2643-1564"]},"citation":{"ama":"Scharwald D, Meier T, Sharapova PR. Phase sensitivity of spatially broadband high-gain &#60;mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"&#62;&#60;mml:mrow&#62;&#60;mml:mi&#62;SU&#60;/mml:mi&#62;&#60;mml:mo&#62;(&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;,&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;)&#60;/mml:mo&#62;&#60;/mml:mrow&#62;&#60;/mml:math&#62; interferometers. <i>Physical Review Research</i>. 2023;5(4). doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">10.1103/physrevresearch.5.043158</a>","ieee":"D. Scharwald, T. Meier, and P. R. Sharapova, “Phase sensitivity of spatially broadband high-gain &#60;mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"&#62;&#60;mml:mrow&#62;&#60;mml:mi&#62;SU&#60;/mml:mi&#62;&#60;mml:mo&#62;(&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;,&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;)&#60;/mml:mo&#62;&#60;/mml:mrow&#62;&#60;/mml:math&#62; interferometers,” <i>Physical Review Research</i>, vol. 5, no. 4, Art. no. 043158, 2023, doi: <a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">10.1103/physrevresearch.5.043158</a>.","chicago":"Scharwald, D., T. Meier, and P. R. Sharapova. “Phase Sensitivity of Spatially Broadband High-Gain &#60;mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"&#62;&#60;mml:Mrow&#62;&#60;mml:Mi&#62;SU&#60;/Mml:Mi&#62;&#60;mml:Mo&#62;(&#60;/Mml:Mo&#62;&#60;mml:Mn&#62;1&#60;/Mml:Mn&#62;&#60;mml:Mo&#62;,&#60;/Mml:Mo&#62;&#60;mml:Mn&#62;1&#60;/Mml:Mn&#62;&#60;mml:Mo&#62;)&#60;/Mml:Mo&#62;&#60;/Mml:Mrow&#62;&#60;/Mml:Math&#62; Interferometers.” <i>Physical Review Research</i> 5, no. 4 (2023). <a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">https://doi.org/10.1103/physrevresearch.5.043158</a>.","apa":"Scharwald, D., Meier, T., &#38; Sharapova, P. R. (2023). Phase sensitivity of spatially broadband high-gain &#60;mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"&#62;&#60;mml:mrow&#62;&#60;mml:mi&#62;SU&#60;/mml:mi&#62;&#60;mml:mo&#62;(&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;,&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;)&#60;/mml:mo&#62;&#60;/mml:mrow&#62;&#60;/mml:math&#62; interferometers. <i>Physical Review Research</i>, <i>5</i>(4), Article 043158. <a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">https://doi.org/10.1103/physrevresearch.5.043158</a>","short":"D. Scharwald, T. Meier, P.R. Sharapova, Physical Review Research 5 (2023).","mla":"Scharwald, D., et al. “Phase Sensitivity of Spatially Broadband High-Gain &#60;mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"&#62;&#60;mml:Mrow&#62;&#60;mml:Mi&#62;SU&#60;/Mml:Mi&#62;&#60;mml:Mo&#62;(&#60;/Mml:Mo&#62;&#60;mml:Mn&#62;1&#60;/Mml:Mn&#62;&#60;mml:Mo&#62;,&#60;/Mml:Mo&#62;&#60;mml:Mn&#62;1&#60;/Mml:Mn&#62;&#60;mml:Mo&#62;)&#60;/Mml:Mo&#62;&#60;/Mml:Mrow&#62;&#60;/Mml:Math&#62; Interferometers.” <i>Physical Review Research</i>, vol. 5, no. 4, 043158, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">10.1103/physrevresearch.5.043158</a>.","bibtex":"@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially broadband high-gain &#60;mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"&#62;&#60;mml:mrow&#62;&#60;mml:mi&#62;SU&#60;/mml:mi&#62;&#60;mml:mo&#62;(&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;,&#60;/mml:mo&#62;&#60;mml:mn&#62;1&#60;/mml:mn&#62;&#60;mml:mo&#62;)&#60;/mml:mo&#62;&#60;/mml:mrow&#62;&#60;/mml:math&#62; interferometers}, volume={5}, DOI={<a href=\"https://doi.org/10.1103/physrevresearch.5.043158\">10.1103/physrevresearch.5.043158</a>}, number={4043158}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Scharwald, D. and Meier, T. and Sharapova, P. R.}, year={2023} }"},"intvolume":"         5","year":"2023","date_created":"2023-11-22T09:18:02Z","author":[{"last_name":"Scharwald","full_name":"Scharwald, D.","first_name":"D."},{"first_name":"T.","full_name":"Meier, T.","last_name":"Meier"},{"first_name":"P. R.","last_name":"Sharapova","full_name":"Sharapova, P. R."}],"volume":5,"date_updated":"2023-11-22T09:19:02Z","publisher":"American Physical Society (APS)","doi":"10.1103/physrevresearch.5.043158","title":"Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers"},{"abstract":[{"lang":"eng","text":"<jats:p>Quantum photonic processing via electro-optic components typically requires electronic links across different operation environments, especially when interfacing cryogenic components such as superconducting single photon detectors with room-temperature control and readout electronics. However, readout and driving electronics can introduce detrimental parasitic effects. Here we show an all-optical control and readout of a superconducting nanowire single photon detector (SNSPD), completely electrically decoupled from room temperature electronics. We provide the operation power for the superconducting detector via a cryogenic photodiode, and readout single photon detection signals via a cryogenic electro-optic modulator in the same cryostat. This method opens the possibility for control and readout of superconducting circuits, and feedforward for photonic quantum computing.</jats:p>"}],"status":"public","type":"journal_article","publication":"Optics Express","article_number":"32717","keyword":["Atomic and Molecular Physics","and Optics"],"language":[{"iso":"eng"}],"_id":"48399","user_id":"50819","year":"2023","citation":{"chicago":"Thiele, Frederik, Thomas Hummel, Adam N. McCaughan, Julian Brockmeier, Maximilian Protte, Victor Quiring, Sebastian Lengeling, Christof Eigner, Christine Silberhorn, and Tim Bartley. “All Optical Operation of a Superconducting Photonic Interface.” <i>Optics Express</i> 31, no. 20 (2023). <a href=\"https://doi.org/10.1364/oe.492035\">https://doi.org/10.1364/oe.492035</a>.","ieee":"F. Thiele <i>et al.</i>, “All optical operation of a superconducting photonic interface,” <i>Optics Express</i>, vol. 31, no. 20, Art. no. 32717, 2023, doi: <a href=\"https://doi.org/10.1364/oe.492035\">10.1364/oe.492035</a>.","ama":"Thiele F, Hummel T, McCaughan AN, et al. All optical operation of a superconducting photonic interface. <i>Optics Express</i>. 2023;31(20). doi:<a href=\"https://doi.org/10.1364/oe.492035\">10.1364/oe.492035</a>","apa":"Thiele, F., Hummel, T., McCaughan, A. N., Brockmeier, J., Protte, M., Quiring, V., Lengeling, S., Eigner, C., Silberhorn, C., &#38; Bartley, T. (2023). All optical operation of a superconducting photonic interface. <i>Optics Express</i>, <i>31</i>(20), Article 32717. <a href=\"https://doi.org/10.1364/oe.492035\">https://doi.org/10.1364/oe.492035</a>","mla":"Thiele, Frederik, et al. “All Optical Operation of a Superconducting Photonic Interface.” <i>Optics Express</i>, vol. 31, no. 20, 32717, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/oe.492035\">10.1364/oe.492035</a>.","bibtex":"@article{Thiele_Hummel_McCaughan_Brockmeier_Protte_Quiring_Lengeling_Eigner_Silberhorn_Bartley_2023, title={All optical operation of a superconducting photonic interface}, volume={31}, DOI={<a href=\"https://doi.org/10.1364/oe.492035\">10.1364/oe.492035</a>}, number={2032717}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Thiele, Frederik and Hummel, Thomas and McCaughan, Adam N. and Brockmeier, Julian and Protte, Maximilian and Quiring, Victor and Lengeling, Sebastian and Eigner, Christof and Silberhorn, Christine and Bartley, Tim}, year={2023} }","short":"F. Thiele, T. Hummel, A.N. McCaughan, J. Brockmeier, M. Protte, V. Quiring, S. Lengeling, C. Eigner, C. Silberhorn, T. Bartley, Optics Express 31 (2023)."},"intvolume":"        31","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"issue":"20","title":"All optical operation of a superconducting photonic interface","doi":"10.1364/oe.492035","publisher":"Optica Publishing Group","date_updated":"2023-11-27T08:43:33Z","date_created":"2023-10-24T06:43:16Z","author":[{"full_name":"Thiele, Frederik","id":"50819","orcid":"0000-0003-0663-5587","last_name":"Thiele","first_name":"Frederik"},{"first_name":"Thomas","full_name":"Hummel, Thomas","id":"83846","last_name":"Hummel"},{"full_name":"McCaughan, Adam N.","last_name":"McCaughan","first_name":"Adam N."},{"last_name":"Brockmeier","id":"44807","full_name":"Brockmeier, Julian","first_name":"Julian"},{"first_name":"Maximilian","id":"46170","full_name":"Protte, Maximilian","last_name":"Protte"},{"full_name":"Quiring, Victor","last_name":"Quiring","first_name":"Victor"},{"first_name":"Sebastian","last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244","full_name":"Eigner, Christof"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"id":"49683","full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim"}],"volume":31},{"language":[{"iso":"eng"}],"keyword":["Condensed Matter Physics","General Materials Science","General Chemistry"],"publication":"Liquid Crystals","title":"Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal","date_created":"2023-04-08T17:21:30Z","publisher":"Informa UK Limited","year":"2023","issue":"7-10","department":[{"_id":"313"},{"_id":"230"}],"user_id":"254","_id":"43440","status":"public","type":"journal_article","doi":"10.1080/02678292.2023.2188494","volume":50,"author":[{"full_name":"Zhang, Bingru","last_name":"Zhang","first_name":"Bingru"},{"first_name":"Linh","last_name":"Nguyen","full_name":"Nguyen, Linh"},{"full_name":"Martens, Kevin","last_name":"Martens","first_name":"Kevin"},{"full_name":"Heuer-Jungemann, Amelie","last_name":"Heuer-Jungemann","first_name":"Amelie"},{"first_name":"Julian","last_name":"Philipp","full_name":"Philipp, Julian"},{"full_name":"Kempter, Susanne","last_name":"Kempter","first_name":"Susanne"},{"full_name":"Rädler, Joachim O.","last_name":"Rädler","first_name":"Joachim O."},{"full_name":"Liedl, Tim","last_name":"Liedl","first_name":"Tim"},{"id":"254","full_name":"Kitzerow, Heinz-Siegfried","last_name":"Kitzerow","first_name":"Heinz-Siegfried"}],"date_updated":"2023-12-13T15:54:31Z","intvolume":"        50","page":"1243-1251","citation":{"ama":"Zhang B, Nguyen L, Martens K, et al. Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal. <i>Liquid Crystals</i>. 2023;50(7-10):1243-1251. doi:<a href=\"https://doi.org/10.1080/02678292.2023.2188494\">10.1080/02678292.2023.2188494</a>","chicago":"Zhang, Bingru, Linh Nguyen, Kevin Martens, Amelie Heuer-Jungemann, Julian Philipp, Susanne Kempter, Joachim O. Rädler, Tim Liedl, and Heinz-Siegfried Kitzerow. “Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic Chromonic Liquid Crystal.” <i>Liquid Crystals</i> 50, no. 7–10 (2023): 1243–51. <a href=\"https://doi.org/10.1080/02678292.2023.2188494\">https://doi.org/10.1080/02678292.2023.2188494</a>.","ieee":"B. Zhang <i>et al.</i>, “Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal,” <i>Liquid Crystals</i>, vol. 50, no. 7–10, pp. 1243–1251, 2023, doi: <a href=\"https://doi.org/10.1080/02678292.2023.2188494\">10.1080/02678292.2023.2188494</a>.","apa":"Zhang, B., Nguyen, L., Martens, K., Heuer-Jungemann, A., Philipp, J., Kempter, S., Rädler, J. O., Liedl, T., &#38; Kitzerow, H.-S. (2023). Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal. <i>Liquid Crystals</i>, <i>50</i>(7–10), 1243–1251. <a href=\"https://doi.org/10.1080/02678292.2023.2188494\">https://doi.org/10.1080/02678292.2023.2188494</a>","bibtex":"@article{Zhang_Nguyen_Martens_Heuer-Jungemann_Philipp_Kempter_Rädler_Liedl_Kitzerow_2023, title={Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid crystal}, volume={50}, DOI={<a href=\"https://doi.org/10.1080/02678292.2023.2188494\">10.1080/02678292.2023.2188494</a>}, number={7–10}, journal={Liquid Crystals}, publisher={Informa UK Limited}, author={Zhang, Bingru and Nguyen, Linh and Martens, Kevin and Heuer-Jungemann, Amelie and Philipp, Julian and Kempter, Susanne and Rädler, Joachim O. and Liedl, Tim and Kitzerow, Heinz-Siegfried}, year={2023}, pages={1243–1251} }","mla":"Zhang, Bingru, et al. “Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic Chromonic Liquid Crystal.” <i>Liquid Crystals</i>, vol. 50, no. 7–10, Informa UK Limited, 2023, pp. 1243–51, doi:<a href=\"https://doi.org/10.1080/02678292.2023.2188494\">10.1080/02678292.2023.2188494</a>.","short":"B. Zhang, L. Nguyen, K. Martens, A. Heuer-Jungemann, J. Philipp, S. Kempter, J.O. Rädler, T. Liedl, H.-S. Kitzerow, Liquid Crystals 50 (2023) 1243–1251."},"publication_identifier":{"issn":["0267-8292","1366-5855"]},"publication_status":"published"},{"language":[{"iso":"ger"}],"keyword":["Textkompetenz","Digitales Lesen und Schreiben","Kollaborativer Umgang mit Texten","Prozedurenorientierte Schreibdidaktik","Design-based-Research"],"abstract":[{"lang":"ger","text":"Im Beitrag wird ein digitales Tool zur fächerübergreifenden Förderung von Textkompetenzen vorgestellt. Zunächst werden die Funktionen des Tools beschrieben und das zugrundeliegende tool-based task Design erläutert. Anhand eines Lehr-Lern-Arrangements zum argumentierenden Schreiben wird exemplarisch gezeigt, wie das Tool im Deutschunterricht eingesetzt werden kann. Anschließend werden erste empirische Befunde aus der am Design-Based-Research orientierten Studie vorgestellt. Abstract (english): AnnoPy – A digital tool for cross-curricular text literacy development In this article we present a digital tool for cross-curricular text literacy development. At first, we describe the basic functions of the tool and the underlying tool-based task design. After that, a teaching arrangement for German lessons is used to show how the tool can be used to foster argumentative writing. Subsequently, first results of the design-based study are presented."},{"lang":"eng","text":"In this article we present a digital tool for cross-curricular text literacy development. At first, we describe the basic functions of the tool and the underlying tool-based task design. After that, a teaching arrangement for German lessons is used to show how the tool can be used to foster argumentative writing. Subsequently, first results of the design-based study are presented."}],"publication":"Medien im Deutschunterricht","title":"AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen","date_created":"2023-12-19T07:49:50Z","year":"2023","quality_controlled":"1","article_type":"original","user_id":"15099","department":[{"_id":"463"}],"_id":"49827","status":"public","type":"journal_article","main_file_link":[{"open_access":"1","url":"https://journals.ub.uni-koeln.de/index.php/midu/article/view/1914"}],"doi":"10.18716/OJS/MIDU/2023.1.5","author":[{"last_name":"Rezat","id":"58338","full_name":"Rezat, Sara","first_name":"Sara"},{"first_name":"Oliver","full_name":"Scholle, Oliver","id":"15099","last_name":"Scholle"}],"date_updated":"2023-12-19T08:10:01Z","oa":"1","citation":{"apa":"Rezat, S., &#38; Scholle, O. (2023). AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen. <i>Medien im Deutschunterricht</i>. <a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">https://doi.org/10.18716/OJS/MIDU/2023.1.5</a>","mla":"Rezat, Sara, and Oliver Scholle. “AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen.” <i>Medien im Deutschunterricht</i>, 2023, doi:<a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">10.18716/OJS/MIDU/2023.1.5</a>.","bibtex":"@article{Rezat_Scholle_2023, title={AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen}, DOI={<a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">10.18716/OJS/MIDU/2023.1.5</a>}, journal={Medien im Deutschunterricht}, author={Rezat, Sara and Scholle, Oliver}, year={2023} }","short":"S. Rezat, O. Scholle, Medien im Deutschunterricht (2023).","ama":"Rezat S, Scholle O. AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen. <i>Medien im Deutschunterricht</i>. Published online 2023. doi:<a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">10.18716/OJS/MIDU/2023.1.5</a>","chicago":"Rezat, Sara, and Oliver Scholle. “AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen.” <i>Medien im Deutschunterricht</i>, 2023. <a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">https://doi.org/10.18716/OJS/MIDU/2023.1.5</a>.","ieee":"S. Rezat and O. Scholle, “AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen,” <i>Medien im Deutschunterricht</i>, 2023, doi: <a href=\"https://doi.org/10.18716/OJS/MIDU/2023.1.5\">10.18716/OJS/MIDU/2023.1.5</a>."},"publication_status":"published"},{"publication":"PAMM","type":"journal_article","abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>The use of heterogeneous materials, such as composites with Prandtl‐Reuss‐type material laws, has increased in industrial praxis, making finite element modeling with homogenization techniques a well‐accepted tool. These methods are particularly advantageous to account for microstructural mechanisms which can be related to nonlinearities and time‐dependency due to elasto‐plasticity behavior. However, their advantages are diminished by increasing computational demand. The present contribution deals with the balance of accuracy and numerical efficiency of nonlinear homogenization associated with a framework of goal‐oriented adaptivity, which takes into account error accumulation over time. To this end, model adaptivity of homogenization methods is coupled to mesh adaptivity on the macro scale. Our new proposed adaptive procedure is driven by a goal‐oriented a posteriori error estimator based on duality techniques using downwind and upwind approximations. Due to nonlinearities and time‐dependency of the plasticity, the estimation of error transport and error generation is obtained with a backward‐in‐time dual method despite a high demand on memory capacity. In this contribution, the dual problem is solved with a forward‐in‐time dual method that allows estimating the full error during the resolution of the primal problem without the need for extra memory capacity. Finally, a numerical example illustrates the effectiveness of the proposed adaptive approach.</jats:p>","lang":"eng"}],"status":"public","_id":"49866","department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"user_id":"335","keyword":["Electrical and Electronic Engineering","Atomic and Molecular Physics","and Optics"],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["1617-7061","1617-7061"]},"quality_controlled":"1","publication_status":"published","year":"2023","citation":{"ieee":"A. Tchomgue Simeu and R. Mahnken, “Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic composites,” <i>PAMM</i>, 2023, doi: <a href=\"https://doi.org/10.1002/pamm.202300136\">10.1002/pamm.202300136</a>.","chicago":"Tchomgue Simeu, Arnold, and Rolf Mahnken. “Downwind and Upwind Approximations for Mesh and Model Adaptivity of Elasto‐plastic Composites.” <i>PAMM</i>, 2023. <a href=\"https://doi.org/10.1002/pamm.202300136\">https://doi.org/10.1002/pamm.202300136</a>.","mla":"Tchomgue Simeu, Arnold, and Rolf Mahnken. “Downwind and Upwind Approximations for Mesh and Model Adaptivity of Elasto‐plastic Composites.” <i>PAMM</i>, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/pamm.202300136\">10.1002/pamm.202300136</a>.","bibtex":"@article{Tchomgue Simeu_Mahnken_2023, title={Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic composites}, DOI={<a href=\"https://doi.org/10.1002/pamm.202300136\">10.1002/pamm.202300136</a>}, journal={PAMM}, publisher={Wiley}, author={Tchomgue Simeu, Arnold and Mahnken, Rolf}, year={2023} }","short":"A. Tchomgue Simeu, R. Mahnken, PAMM (2023).","apa":"Tchomgue Simeu, A., &#38; Mahnken, R. (2023). Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic composites. <i>PAMM</i>. <a href=\"https://doi.org/10.1002/pamm.202300136\">https://doi.org/10.1002/pamm.202300136</a>","ama":"Tchomgue Simeu A, Mahnken R. Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic composites. <i>PAMM</i>. Published online 2023. doi:<a href=\"https://doi.org/10.1002/pamm.202300136\">10.1002/pamm.202300136</a>"},"publisher":"Wiley","date_updated":"2023-12-19T12:20:51Z","date_created":"2023-12-19T12:20:05Z","author":[{"full_name":"Tchomgue Simeu, Arnold","id":"83075","last_name":"Tchomgue Simeu","first_name":"Arnold"},{"first_name":"Rolf","id":"335","full_name":"Mahnken, Rolf","last_name":"Mahnken"}],"title":"Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic composites","doi":"10.1002/pamm.202300136"},{"abstract":[{"lang":"eng","text":"In the last decade, conductive domain walls (CDWs) in single crystals of the uniaxial model ferroelectric lithium niobate (LiNbO3; LNO) have been shown to reach resistances more than 10 orders of magnitude lower than the resistance of the surrounding bulk, with charge carriers being firmly confined to sheets with a width of a few nanometers. LNO is thus currently witnessing increased attention because of its potential in the design of room-temperature nanoelectronic circuits and devices based on such CDWs. In this context, the reliable determination of the fundamental transport parameters of LNO CDWs, in particular the 2D charge carrier density n2D and the Hall mobility μH of the majority carriers, is of great interest. In this contribution, we present and apply a robust and easy-to-prepare Hall-effect measurement setup by adapting the standard four-probe van der Pauw method to contact a single, hexagonally shaped domain wall that fully penetrates the 200-μm-thick LNO bulk single crystal. We then determine n2D and μH for a set of external magnetic fields B and prove the expected cosinelike angular dependence of the Hall voltage. Lastly, we present photoinduced-Hall-effect measurements of one and the same DW, by determining the impact of super-band-gap illumination on n2D."}],"status":"public","publication":"Physical Review Applied","type":"journal_article","keyword":["General Physics and Astronomy"],"article_type":"original","article_number":"064043","language":[{"iso":"eng"}],"_id":"50407","user_id":"22501","year":"2023","intvolume":"        20","citation":{"ama":"Beccard H, Beyreuther E, Kirbus B, Seddon SD, Rüsing M, Eng LM. Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall. <i>Physical Review Applied</i>. 2023;20(6). doi:<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>","ieee":"H. Beccard, E. Beyreuther, B. Kirbus, S. D. Seddon, M. Rüsing, and L. M. Eng, “Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall,” <i>Physical Review Applied</i>, vol. 20, no. 6, Art. no. 064043, 2023, doi: <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>.","chicago":"Beccard, Henrik, Elke Beyreuther, Benjamin Kirbus, Samuel D. Seddon, Michael Rüsing, and Lukas M. Eng. “Hall Mobilities and Sheet Carrier Densities in a Single LiNbO3 Conductive Ferroelectric Domain Wall.” <i>Physical Review Applied</i> 20, no. 6 (2023). <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">https://doi.org/10.1103/physrevapplied.20.064043</a>.","apa":"Beccard, H., Beyreuther, E., Kirbus, B., Seddon, S. D., Rüsing, M., &#38; Eng, L. M. (2023). Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall. <i>Physical Review Applied</i>, <i>20</i>(6), Article 064043. <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">https://doi.org/10.1103/physrevapplied.20.064043</a>","short":"H. Beccard, E. Beyreuther, B. Kirbus, S.D. Seddon, M. Rüsing, L.M. Eng, Physical Review Applied 20 (2023).","bibtex":"@article{Beccard_Beyreuther_Kirbus_Seddon_Rüsing_Eng_2023, title={Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall}, volume={20}, DOI={<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>}, number={6064043}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Beccard, Henrik and Beyreuther, Elke and Kirbus, Benjamin and Seddon, Samuel D. and Rüsing, Michael and Eng, Lukas M.}, year={2023} }","mla":"Beccard, Henrik, et al. “Hall Mobilities and Sheet Carrier Densities in a Single LiNbO3 Conductive Ferroelectric Domain Wall.” <i>Physical Review Applied</i>, vol. 20, no. 6, 064043, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>."},"publication_identifier":{"issn":["2331-7019"]},"publication_status":"published","issue":"6","title":"Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall","doi":"10.1103/physrevapplied.20.064043","main_file_link":[{"url":"https://arxiv.org/pdf/2308.00061.pdf","open_access":"1"}],"oa":"1","publisher":"American Physical Society (APS)","date_updated":"2024-01-09T15:05:29Z","volume":20,"author":[{"first_name":"Henrik","full_name":"Beccard, Henrik","last_name":"Beccard"},{"full_name":"Beyreuther, Elke","last_name":"Beyreuther","first_name":"Elke"},{"first_name":"Benjamin","full_name":"Kirbus, Benjamin","last_name":"Kirbus"},{"first_name":"Samuel D.","last_name":"Seddon","full_name":"Seddon, Samuel D."},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"date_created":"2024-01-09T15:03:22Z"},{"file_date_updated":"2024-01-22T14:32:38Z","_id":"50731","department":[{"_id":"386"}],"user_id":"44191","status":"public","type":"dissertation","doi":"10.17619/UNIPB/1-1869","date_updated":"2024-01-22T14:36:17Z","supervisor":[{"first_name":"Sabine","full_name":"Fechner, Sabine","last_name":"Fechner"}],"author":[{"id":"44191","full_name":"Pollmeier, Pascal","last_name":"Pollmeier","first_name":"Pascal"}],"page":"357","citation":{"apa":"Pollmeier, P. (2023). <i>Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung</i>. Universität Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-1869\">https://doi.org/10.17619/UNIPB/1-1869</a>","mla":"Pollmeier, Pascal. <i>Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung</i>. Universität Paderborn, 2023, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1869\">10.17619/UNIPB/1-1869</a>.","bibtex":"@book{Pollmeier_2023, title={Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1869\">10.17619/UNIPB/1-1869</a>}, publisher={Universität Paderborn}, author={Pollmeier, Pascal}, year={2023} }","short":"P. Pollmeier, Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung, Universität Paderborn, 2023.","chicago":"Pollmeier, Pascal. <i>Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung</i>. Universität Paderborn, 2023. <a href=\"https://doi.org/10.17619/UNIPB/1-1869\">https://doi.org/10.17619/UNIPB/1-1869</a>.","ieee":"P. Pollmeier, <i>Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung</i>. Universität Paderborn, 2023.","ama":"Pollmeier P. <i>Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung</i>. Universität Paderborn; 2023. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1869\">10.17619/UNIPB/1-1869</a>"},"has_accepted_license":"1","keyword":["Epistemologie","Evidenzen","evidence-based practice"],"ddc":["370"],"language":[{"iso":"ger"}],"abstract":[{"text":"Eine Forderung nach evidenzbasierter Praxis (EBP) im Bildungswesen kann sowohl vor dem Hintergrund der Bedeutung wissenschaftlicher Evidenzen innerhalb gesellschaftlicher Diskurse als auch der Evidenzbasierung in anderen Bereichen formuliert werden. Der Umgang mit und die Bewertung von Evidenzen stellen somit vor dem Hintergrund epistemologischer Überzeugungen relevante Aufgaben für den Chemieunterricht dar. Dabei ist unklar, inwiefern (angehende) Lehrkräfte über Kompetenzen in EBP verfügen. Bestehende Studien weisen auf einen Bedarf der fachdidaktischen Analyse und Förderung von Kompetenzen in EBP bei angehenden Lehrkräften hin.Im Rahmen dieser Dissertation wurde die Domänenspezifität der Kompetenzen in EBP sowie deren Förderung in einem fachdidaktischen Kontext untersucht. Dabei wurde ein weiterer Schwerpunkt auf den Umgang mit anomalen Beobachtungen im Sinne widersprüchlicher Evidenzen gelegt. Innerhalb von drei Teilstudien wurden unterschiedliche methodische Zugänge zur Kompetenz in EBP auf Grundlage epistemologischer Überzeugungen gewählt.Die Ergebnisse weisen auf einen Förderbedarf der Kompetenz in EBP für angehende Lehrkräfte aller Unterrichtsfächer hin. Eine entwickelte Intervention für angehende Chemielehrkräfte weist eine Wirksamkeit zur Förderung von Kompetenzen in EBP auf. Im Rahmen einer Modellierungsstudie kann der Einfluss von Fachwissen sowie Indizien für einen Einfluss epistemologischer Überzeugungen auf den Umgang mit anomalen Beobachtungen gezeigt werden.","lang":"eng"},{"text":"The role of evidence based practice (EBP) in educational contexts can be argued from the necessity ofevidence for societal debates, as well as evidence based practice in other research fields, such asmedicine. Therefore, using evidence based on epistemological beliefs is a relevant task for scienceeducation. However, i t is unclear whether pre service teachers hold necessary competences in EBP.Existing research indicates a need for the analysis and promotion of competences in EBP for pre serviceteachers from a scien ce education perspective.This project aims at investigating the domainspecificity and promotion of competences in EBP of preservice teachers. An additional emphasis is put on the reaction to anomalous observations ascontradictory evidence. Within three sub studies, different methodological approaches were used togather insights into the competence in EBP from the base of epistemological beliefs.As results show, there is a need for promotion in competences in EBP for preservice teachers in allsubjects. Therefore, the developed intervention for the promotion of pre service chemistry teacherscompetence in EBP shows to be effective. Moreover, the impact of content knowledge and the role ofepistemological beliefs on the interpretation of anomalous observations could be demonstrated.","lang":"eng"}],"file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":16219829,"file_name":"Dissertation_Pollmeier_Veröffentlichung UB.pdf","file_id":"50733","access_level":"closed","date_updated":"2024-01-22T14:32:38Z","creator":"pascalp","date_created":"2024-01-22T14:32:38Z"}],"title":"Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung","publisher":"Universität Paderborn","date_created":"2024-01-22T14:28:52Z","year":"2023"},{"user_id":"45537","department":[{"_id":"9"},{"_id":"367"},{"_id":"321"},{"_id":"219"},{"_id":"624"}],"_id":"48277","status":"public","type":"journal_article","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1002/masy.202200181"}],"doi":"10.1002/masy.202200181","conference":{"location":"Bukarest","end_date":"2022-11-26","start_date":"2022-11-13","name":"POLCOM 2022"},"author":[{"last_name":"Moritzer","full_name":"Moritzer, Elmar","id":"20531","first_name":"Elmar"},{"first_name":"Felix","full_name":"Hecker, Felix","id":"45537","last_name":"Hecker"}],"volume":411,"date_updated":"2024-02-23T08:36:42Z","oa":"1","citation":{"ieee":"E. Moritzer and F. Hecker, “Adaptive Scaling of Components in the Fused Deposition Modeling Process,” <i>Macromolecular Symposia</i>, vol. 411, no. 1, 2023, doi: <a href=\"https://doi.org/10.1002/masy.202200181\">10.1002/masy.202200181</a>.","chicago":"Moritzer, Elmar, and Felix Hecker. “Adaptive Scaling of Components in the Fused Deposition Modeling Process.” <i>Macromolecular Symposia</i> 411, no. 1 (2023). <a href=\"https://doi.org/10.1002/masy.202200181\">https://doi.org/10.1002/masy.202200181</a>.","ama":"Moritzer E, Hecker F. Adaptive Scaling of Components in the Fused Deposition Modeling Process. <i>Macromolecular Symposia</i>. 2023;411(1). doi:<a href=\"https://doi.org/10.1002/masy.202200181\">10.1002/masy.202200181</a>","bibtex":"@article{Moritzer_Hecker_2023, title={Adaptive Scaling of Components in the Fused Deposition Modeling Process}, volume={411}, DOI={<a href=\"https://doi.org/10.1002/masy.202200181\">10.1002/masy.202200181</a>}, number={1}, journal={Macromolecular Symposia}, publisher={Wiley}, author={Moritzer, Elmar and Hecker, Felix}, year={2023} }","short":"E. Moritzer, F. Hecker, Macromolecular Symposia 411 (2023).","mla":"Moritzer, Elmar, and Felix Hecker. “Adaptive Scaling of Components in the Fused Deposition Modeling Process.” <i>Macromolecular Symposia</i>, vol. 411, no. 1, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/masy.202200181\">10.1002/masy.202200181</a>.","apa":"Moritzer, E., &#38; Hecker, F. (2023). Adaptive Scaling of Components in the Fused Deposition Modeling Process. <i>Macromolecular Symposia</i>, <i>411</i>(1). <a href=\"https://doi.org/10.1002/masy.202200181\">https://doi.org/10.1002/masy.202200181</a>"},"intvolume":"       411","publication_status":"published","publication_identifier":{"issn":["1022-1360","1521-3900"]},"language":[{"iso":"eng"}],"keyword":["Materials Chemistry","Polymers and Plastics","Organic Chemistry","Condensed Matter Physics"],"abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title><jats:p>Currently, the fused deposition modeling (FDM) process is the most common additive manufacturing technology. The principle of the FDM process is the strand wise deposition of molten thermoplastic polymers, by feeding a filament trough a heated nozzle. Due to the strand and layer wise deposition the cooling of the manufactured component is not uniform. This leads to dimensional deviations which may cause the component to be unusable for the desired application. In this paper, a method is described which is based on the shrinkage compensation through the adaption of every single raster line in components manufactured with the FDM process. The shrinkage compensation is based on a model resulting from a DOE which considers the main influencing factors on the shrinkage behavior of raster lines in the FDM process. An in‐house developed software analyzes the component and locally applies the shrinkage compensation with consideration of the boundary conditions, e.g., the position of the raster line in the component and the process parameters. Following, a validation using a simple geometry is conducted to show the effect of the presented adaptive scaling method.</jats:p>"}],"publication":"Macromolecular Symposia","title":"Adaptive Scaling of Components in the Fused Deposition Modeling Process","date_created":"2023-10-19T07:25:06Z","publisher":"Wiley","year":"2023","issue":"1","quality_controlled":"1"},{"author":[{"first_name":"Usman","last_name":"Ali","full_name":"Ali, Usman"},{"full_name":"Holthaus, Martin","last_name":"Holthaus","first_name":"Martin"},{"id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"}],"date_created":"2024-02-27T13:57:01Z","volume":5,"date_updated":"2024-02-28T12:53:40Z","publisher":"American Physical Society (APS)","doi":"10.1103/physrevresearch.5.043152","title":"Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice","issue":"4","publication_status":"published","publication_identifier":{"issn":["2643-1564"]},"citation":{"bibtex":"@article{Ali_Holthaus_Meier_2023, title={Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice}, volume={5}, DOI={<a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">10.1103/physrevresearch.5.043152</a>}, number={4043152}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Ali, Usman and Holthaus, Martin and Meier, Torsten}, year={2023} }","mla":"Ali, Usman, et al. “Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice.” <i>Physical Review Research</i>, vol. 5, no. 4, 043152, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">10.1103/physrevresearch.5.043152</a>.","short":"U. Ali, M. Holthaus, T. Meier, Physical Review Research 5 (2023).","apa":"Ali, U., Holthaus, M., &#38; Meier, T. (2023). Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. <i>Physical Review Research</i>, <i>5</i>(4), Article 043152. <a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">https://doi.org/10.1103/physrevresearch.5.043152</a>","ieee":"U. Ali, M. Holthaus, and T. Meier, “Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice,” <i>Physical Review Research</i>, vol. 5, no. 4, Art. no. 043152, 2023, doi: <a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">10.1103/physrevresearch.5.043152</a>.","chicago":"Ali, Usman, Martin Holthaus, and Torsten Meier. “Chirped Bloch-Harmonic Oscillations in a Parametrically Forced Optical Lattice.” <i>Physical Review Research</i> 5, no. 4 (2023). <a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">https://doi.org/10.1103/physrevresearch.5.043152</a>.","ama":"Ali U, Holthaus M, Meier T. Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice. <i>Physical Review Research</i>. 2023;5(4). doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.043152\">10.1103/physrevresearch.5.043152</a>"},"intvolume":"         5","year":"2023","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"}],"_id":"52122","language":[{"iso":"eng"}],"article_number":"043152","keyword":["General Physics and Astronomy"],"type":"journal_article","publication":"Physical Review Research","status":"public"},{"quality_controlled":"1","publication_identifier":{"issn":["1617-7061","1617-7061"]},"publication_status":"published","year":"2023","citation":{"chicago":"Börger, Alexander, and Rolf Mahnken. “A Micropolar Model Accounting for Asymmetric Behavior of Cold‐box Sand in Relation to Tensile and Compression Tests.” <i>PAMM</i>, 2023. <a href=\"https://doi.org/10.1002/pamm.202300126\">https://doi.org/10.1002/pamm.202300126</a>.","ieee":"A. Börger and R. Mahnken, “A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests,” <i>PAMM</i>, 2023, doi: <a href=\"https://doi.org/10.1002/pamm.202300126\">10.1002/pamm.202300126</a>.","bibtex":"@article{Börger_Mahnken_2023, title={A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests}, DOI={<a href=\"https://doi.org/10.1002/pamm.202300126\">10.1002/pamm.202300126</a>}, journal={PAMM}, publisher={Wiley}, author={Börger, Alexander and Mahnken, Rolf}, year={2023} }","short":"A. Börger, R. Mahnken, PAMM (2023).","mla":"Börger, Alexander, and Rolf Mahnken. “A Micropolar Model Accounting for Asymmetric Behavior of Cold‐box Sand in Relation to Tensile and Compression Tests.” <i>PAMM</i>, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/pamm.202300126\">10.1002/pamm.202300126</a>.","apa":"Börger, A., &#38; Mahnken, R. (2023). A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests. <i>PAMM</i>. <a href=\"https://doi.org/10.1002/pamm.202300126\">https://doi.org/10.1002/pamm.202300126</a>","ama":"Börger A, Mahnken R. A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests. <i>PAMM</i>. Published online 2023. doi:<a href=\"https://doi.org/10.1002/pamm.202300126\">10.1002/pamm.202300126</a>"},"date_updated":"2024-02-29T13:59:31Z","publisher":"Wiley","author":[{"last_name":"Börger","full_name":"Börger, Alexander","first_name":"Alexander"},{"last_name":"Mahnken","full_name":"Mahnken, Rolf","id":"335","first_name":"Rolf"}],"date_created":"2024-02-29T13:59:12Z","title":"A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests","doi":"10.1002/pamm.202300126","publication":"PAMM","type":"journal_article","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title><jats:p>Cold‐box sand (CBS) belongs to the granular materials and consists of sand and a binder. The behavior of CBS is simulated with a micropolar model, whereby the additional degree of freedom of the model describes the rotation of the sand grains. The model is used to generate a shear band under pressure for three different meshes, where the force‐displacement curves of the three meshes converge so that no mesh dependence occurs. Another requirement of the model is the consideration of asymmetric behavior for compression and tension. Due to the additional degree of freedom the implicit implementation of the micropolar continuum is very time‐consuming. Therefore, an explicit implementation is considered as an alternative possibility. This paper compares the advantages and disadvantages of both methods and the results for both calculations.</jats:p>"}],"status":"public","_id":"52219","department":[{"_id":"9"},{"_id":"154"},{"_id":"321"}],"user_id":"335","keyword":["Electrical and Electronic Engineering","Atomic and Molecular Physics","and Optics"],"language":[{"iso":"eng"}]}]