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Fachwissen als Grundlage fachdidaktischer Urteilskompetenz – Beispiele für die Herstellung konzeptueller Bezüge zwischen fachwissenschaftlicher und fachdidaktischer Lehre im gymnasialen Lehramtsstudium. In: Isaev V, Eichler A, Loose F, eds. <i> Professionsorientierte Fachwissenschaft. Kohärenzstiftende Lerngelegenheiten für das Lehramtsstudium Mathematik</i>. 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Springer International Publishing, 2022, doi:<a href=\"https://doi.org/10.1007/978-3-030-89921-9\">10.1007/978-3-030-89921-9</a>.","ama":"Hagengruber RE, ed. <i>Époque Émilienne</i>. Springer International Publishing; 2022. doi:<a href=\"https://doi.org/10.1007/978-3-030-89921-9\">10.1007/978-3-030-89921-9</a>","bibtex":"@book{Hagengruber_2022, place={Cham}, title={Époque Émilienne}, DOI={<a href=\"https://doi.org/10.1007/978-3-030-89921-9\">10.1007/978-3-030-89921-9</a>}, publisher={Springer International Publishing}, year={2022} }","apa":"Hagengruber, R. E. (Ed.). (2022). <i>Époque Émilienne</i>. Springer International Publishing. <a href=\"https://doi.org/10.1007/978-3-030-89921-9\">https://doi.org/10.1007/978-3-030-89921-9</a>","ieee":"R. E. Hagengruber, Ed., <i>Époque Émilienne</i>. Cham: Springer International Publishing, 2022.","chicago":"Hagengruber, Ruth Edith, ed. <i>Époque Émilienne</i>. Cham: Springer International Publishing, 2022. <a href=\"https://doi.org/10.1007/978-3-030-89921-9\">https://doi.org/10.1007/978-3-030-89921-9</a>.","short":"R.E. Hagengruber, ed., Époque Émilienne, Springer International Publishing, Cham, 2022."},"quality_controlled":"1","place":"Cham"},{"page":"1516-1526","_id":"32413","publisher":"Trans Tech Publications, Ltd.","user_id":"7850","volume":926,"status":"public","citation":{"ieee":"C. R. Bielak, M. Böhnke, M. Bobbert, and G. Meschut, “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints,” <i>Key Engineering Materials</i>, vol. 926, pp. 1516–1526, 2022, doi: <a href=\"https://doi.org/10.4028/p-5d009y\">10.4028/p-5d009y</a>.","apa":"Bielak, C. R., Böhnke, M., Bobbert, M., &#38; Meschut, G. (2022). Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints. <i>Key Engineering Materials</i>, <i>926</i>, 1516–1526. <a href=\"https://doi.org/10.4028/p-5d009y\">https://doi.org/10.4028/p-5d009y</a>","short":"C.R. Bielak, M. Böhnke, M. Bobbert, G. Meschut, Key Engineering Materials 926 (2022) 1516–1526.","chicago":"Bielak, Christian Roman, Max Böhnke, Mathias Bobbert, and Gerson Meschut. “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints.” <i>Key Engineering Materials</i> 926 (2022): 1516–26. <a href=\"https://doi.org/10.4028/p-5d009y\">https://doi.org/10.4028/p-5d009y</a>.","mla":"Bielak, Christian Roman, et al. “Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints.” <i>Key Engineering Materials</i>, vol. 926, Trans Tech Publications, Ltd., 2022, pp. 1516–26, doi:<a href=\"https://doi.org/10.4028/p-5d009y\">10.4028/p-5d009y</a>.","bibtex":"@article{Bielak_Böhnke_Bobbert_Meschut_2022, title={Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints}, volume={926}, DOI={<a href=\"https://doi.org/10.4028/p-5d009y\">10.4028/p-5d009y</a>}, journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.}, author={Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}, year={2022}, pages={1516–1526} }","ama":"Bielak CR, Böhnke M, Bobbert M, Meschut G. Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints. <i>Key Engineering Materials</i>. 2022;926:1516-1526. doi:<a href=\"https://doi.org/10.4028/p-5d009y\">10.4028/p-5d009y</a>"},"quality_controlled":"1","language":[{"iso":"eng"}],"doi":"10.4028/p-5d009y","year":"2022","title":"Experimental and Numerical Investigation on Manufacturing-Induced Pre-Strain on the Load-Bearing Capacity of Clinched Joints","publication_identifier":{"issn":["1662-9795"]},"author":[{"full_name":"Bielak, Christian Roman","first_name":"Christian Roman","last_name":"Bielak","id":"34782"},{"id":"45779","full_name":"Böhnke, Max","first_name":"Max","last_name":"Böhnke"},{"last_name":"Bobbert","first_name":"Mathias","full_name":"Bobbert, Mathias","id":"7850"},{"first_name":"Gerson","orcid":"0000-0002-2763-1246","last_name":"Meschut","full_name":"Meschut, Gerson","id":"32056"}],"date_updated":"2023-01-12T14:22:52Z","publication_status":"published","intvolume":"       926","date_created":"2022-07-25T11:16:15Z","keyword":["Mechanical Engineering","Mechanics of Materials","General Materials Science"],"type":"journal_article","department":[{"_id":"157"}],"publication":"Key Engineering Materials","abstract":[{"lang":"eng","text":"Background. Clinching is a conventional cold forming process in which two or more sheets can be joined without auxiliary parts. A pre-forming of the parts to be joined, which is introduced by previous manufacturing steps, has an influence on the joining result. When considering the suitability for joining with regard to the formability of the materials, the influence of the preforming steps must be taken into account. The influences of strain hardening and sheet thickness on the joining properties must be investigated. In this context, a Finite Element Method (FEM) based metamodel analysis of the clinching process was carried out in [1] to investigate the robustness of the clinching process with respect to the different material pre-strains. In [2], the method was extended to the load bearing simulation.Procedure. The metamodel from preliminary work based on various FE models, which predicts the load-bearing capacity of a clinched joint influenced by pre-straining, is compared here with experimental data and the accuracy of the metamodel prediction is discussed. For this purpose an experimental procedure was further develop which allows the preforming of metal sheets from which joining specimens can be separated with a certain degree of unidirectional deformation. In the study, the procedure for preparing the joint specimens and the results of the loading tests are presented. Different possible relevant pre-strain combinations are investigated and compared with the simulation results, to validate the FE models and choose suitable metamodel.</jats:p>"}]},{"title":"Knowledge Equity and Open Science in qualitative research – Practical research considerations","year":"2022","publication_identifier":{"issn":["2367-7163"]},"author":[{"full_name":"Steinhardt, Isabel","last_name":"Steinhardt","first_name":"Isabel","orcid":"https://orcid.org/0000-0002-2590-6189","id":"90339"},{"full_name":"Kruschick, Felicitas","last_name":"Kruschick","first_name":"Felicitas"}],"publication_status":"published","date_updated":"2023-01-13T08:41:34Z","article_type":"original","intvolume":"         8","main_file_link":[{"url":"https://riojournal.com/article/86387/","open_access":"1"}],"language":[{"iso":"eng"}],"doi":"10.3897/rio.8.e86387","publication":"Research Ideas and Outcomes","abstract":[{"text":"<jats:p>How can Knowledge In/Equity be addressed in qualitative research by taking the idea of Open Science into account? Two projects from the Open Science Fellows Programme by Wikimedia Deutschland will be used to illustrate how Open Science practices can succeed in qualitative research, thereby reducing In/Equity. In this context, In/Equity is considered as a fair and equal representation of people, their knowledge and insights and comprehends questions about how epistemic, structural, institutional and personal biases generate and shape knowledge as guidance. Three questions guide this approach: firstly, what do we understand by In/Equity in the context of knowledge production in these projects? Secondly, who will be involved in knowledge generation and to what extent will they be valued or unvalued? Thirdly, how can data be made accessible for re-use to enable true participation and sharing?</jats:p>","lang":"eng"}],"file":[{"date_created":"2023-01-13T08:39:48Z","creator":"isste","file_id":"36525","success":1,"content_type":"application/pdf","file_name":"2022 Steinhardt, Kruschick Knowledge Equity.pdf","file_size":208525,"access_level":"closed","relation":"main_file","date_updated":"2023-01-13T08:39:48Z"}],"date_created":"2023-01-13T08:33:03Z","type":"journal_article","keyword":["Open Science","Knowledge Equity","Qualitative Methods"],"department":[{"_id":"121"}],"status":"public","has_accepted_license":"1","page":"e86387","publisher":"Pensoft Publishers","_id":"36524","user_id":"90339","ddc":["300"],"volume":8,"file_date_updated":"2023-01-13T08:39:48Z","citation":{"bibtex":"@article{Steinhardt_Kruschick_2022, title={Knowledge Equity and Open Science in qualitative research – Practical research considerations}, volume={8}, DOI={<a href=\"https://doi.org/10.3897/rio.8.e86387\">10.3897/rio.8.e86387</a>}, journal={Research Ideas and Outcomes}, publisher={Pensoft Publishers}, author={Steinhardt, Isabel and Kruschick, Felicitas}, year={2022}, pages={e86387} }","ama":"Steinhardt I, Kruschick F. Knowledge Equity and Open Science in qualitative research – Practical research considerations. <i>Research Ideas and Outcomes</i>. 2022;8:e86387. doi:<a href=\"https://doi.org/10.3897/rio.8.e86387\">10.3897/rio.8.e86387</a>","short":"I. Steinhardt, F. Kruschick, Research Ideas and Outcomes 8 (2022) e86387.","chicago":"Steinhardt, Isabel, and Felicitas Kruschick. “Knowledge Equity and Open Science in Qualitative Research – Practical Research Considerations.” <i>Research Ideas and Outcomes</i> 8 (2022): e86387. <a href=\"https://doi.org/10.3897/rio.8.e86387\">https://doi.org/10.3897/rio.8.e86387</a>.","ieee":"I. Steinhardt and F. Kruschick, “Knowledge Equity and Open Science in qualitative research – Practical research considerations,” <i>Research Ideas and Outcomes</i>, vol. 8, p. e86387, 2022, doi: <a href=\"https://doi.org/10.3897/rio.8.e86387\">10.3897/rio.8.e86387</a>.","mla":"Steinhardt, Isabel, and Felicitas Kruschick. “Knowledge Equity and Open Science in Qualitative Research – Practical Research Considerations.” <i>Research Ideas and Outcomes</i>, vol. 8, Pensoft Publishers, 2022, p. e86387, doi:<a href=\"https://doi.org/10.3897/rio.8.e86387\">10.3897/rio.8.e86387</a>.","apa":"Steinhardt, I., &#38; Kruschick, F. (2022). Knowledge Equity and Open Science in qualitative research – Practical research considerations. <i>Research Ideas and Outcomes</i>, <i>8</i>, e86387. <a href=\"https://doi.org/10.3897/rio.8.e86387\">https://doi.org/10.3897/rio.8.e86387</a>"},"quality_controlled":"1","oa":"1"},{"_id":"36538","page":"379-394","ddc":["300"],"user_id":"90339","status":"public","has_accepted_license":"1","oa":"1","citation":{"mla":"Hiebl, Johannes, et al. “Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie.” <i>die hochschule</i>, no. 8, 2022, pp. 379–94, doi:<a href=\"https://doi.org/10.3278/HSL2227W\">10.3278/HSL2227W</a>.","bibtex":"@article{Hiebl_Steinhardt_Bigos_2022, title={Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie}, DOI={<a href=\"https://doi.org/10.3278/HSL2227W\">10.3278/HSL2227W</a>}, number={8}, journal={die hochschule}, author={Hiebl, Johannes and Steinhardt, Isabel and Bigos, Michael}, year={2022}, pages={379–394} }","ama":"Hiebl J, Steinhardt I, Bigos M. Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie. <i>die hochschule</i>. 2022;(8):379-394. doi:<a href=\"https://doi.org/10.3278/HSL2227W\">10.3278/HSL2227W</a>","ieee":"J. Hiebl, I. Steinhardt, and M. Bigos, “Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie,” <i>die hochschule</i>, no. 8, pp. 379–394, 2022, doi: <a href=\"https://doi.org/10.3278/HSL2227W\">10.3278/HSL2227W</a>.","apa":"Hiebl, J., Steinhardt, I., &#38; Bigos, M. (2022). Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie. <i>die hochschule</i>, <i>8</i>, 379–394. <a href=\"https://doi.org/10.3278/HSL2227W\">https://doi.org/10.3278/HSL2227W</a>","short":"J. Hiebl, I. Steinhardt, M. Bigos, die hochschule (2022) 379–394.","chicago":"Hiebl, Johannes, Isabel Steinhardt, and Michael Bigos. “Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie.” <i>die hochschule</i>, no. 8 (2022): 379–94. <a href=\"https://doi.org/10.3278/HSL2227W\">https://doi.org/10.3278/HSL2227W</a>."},"file_date_updated":"2023-01-13T09:11:05Z","quality_controlled":"1","language":[{"iso":"ger"}],"main_file_link":[{"url":"https://www.wbv.de/shop/Die-Un-Sichtbarkeit-von-offenen-Bildungsmaterialien-in-der-Soziologie-HSL2227W","open_access":"1"}],"doi":"10.3278/HSL2227W","author":[{"last_name":"Hiebl","first_name":"Johannes","full_name":"Hiebl, Johannes"},{"orcid":"https://orcid.org/0000-0002-2590-6189","first_name":"Isabel","last_name":"Steinhardt","full_name":"Steinhardt, Isabel","id":"90339"},{"last_name":"Bigos","first_name":"Michael","full_name":"Bigos, Michael"}],"publication_identifier":{"issn":["2199-8825"]},"year":"2022","title":"Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien in der Soziologie","article_type":"original","date_updated":"2023-01-13T09:22:13Z","publication_status":"published","date_created":"2023-01-13T09:13:55Z","file":[{"date_updated":"2023-01-13T09:11:05Z","relation":"main_file","access_level":"closed","file_size":608633,"file_name":"2022 Hiebl et al. Die (Un-)Sichtbarkeit von (offenen) Bildungsmaterialien.pdf","success":1,"content_type":"application/pdf","file_id":"36541","creator":"isste","date_created":"2023-01-13T09:11:05Z"}],"department":[{"_id":"121"}],"type":"journal_article","keyword":["Soziologie","Praxistheorie","Repositorien","Open Educational Resources","OER"],"issue":"8","publication":"die hochschule","abstract":[{"lang":"ger","text":"Der Beitrag beschäftigt sich mit dem Gebrauch von sogenannten Open Educational Resources (OER) innerhalb der deutschsprachigen Soziologie. OER sind Lehr-und Lernmaterialien, die öffent-lich und frei von Kosten zugänglich sind sowie unter einer offenen Lizenz stehen, die es erlaubt, das Material frei zu nutzen, zu vervielfältigen und zu bearbeiten. Um diese Form der Bereitstellung von Lehr-und Lernmaterial zu fördern, sind im deutschen Sprachraum in den letzten Jahren verschie-dene digitale Infrastrukturen entstanden, die an einzelnen Hochschulstandorten, aber auch hochschulübergreifend Lehrenden zur Verfügung stehen, um dort ihr Material zu veröffentlichen. Es wurden 37 dieser Repositorien untersucht. Darüber hinaus wurde auch die Videoplattform YouTube nach soziologischem Lehr-und Lernmaterial durchforstet. Der Beitrag stellt den Zeitverlauf und die Akteur:innen der OER-Veröffentlichungen dar. Anschließend soll mithilfe eines praxistheoretischen Vokabulars die Lehre innerhalb der Soziologie aufgeschlüsselt und ein möglicher Bezug zu den empirischen Ergebnissen hergestellt werden."}]},{"volume":131,"user_id":"22501","_id":"47984","funded_apc":"1","publisher":"AIP Publishing","status":"public","oa":"1","quality_controlled":"1","citation":{"mla":"Hegarty, Peter A., et al. “Turn All the Lights off: Bright- and Dark-Field Second-Harmonic Microscopy to Select Contrast Mechanisms for Ferroelectric Domain Walls.” <i>Journal of Applied Physics</i>, vol. 131, no. 24, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>.","bibtex":"@article{Hegarty_Beccard_Eng_Rüsing_2022, title={Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls}, volume={131}, DOI={<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>}, number={24}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Hegarty, Peter A. and Beccard, Henrik and Eng, Lukas M. and Rüsing, Michael}, year={2022} }","ama":"Hegarty PA, Beccard H, Eng LM, Rüsing M. Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls. <i>Journal of Applied Physics</i>. 2022;131(24). doi:<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>","ieee":"P. A. Hegarty, H. Beccard, L. M. Eng, and M. Rüsing, “Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls,” <i>Journal of Applied Physics</i>, vol. 131, no. 24, 2022, doi: <a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>.","apa":"Hegarty, P. A., Beccard, H., Eng, L. M., &#38; Rüsing, M. (2022). Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls. <i>Journal of Applied Physics</i>, <i>131</i>(24). <a href=\"https://doi.org/10.1063/5.0094988\">https://doi.org/10.1063/5.0094988</a>","short":"P.A. Hegarty, H. Beccard, L.M. Eng, M. Rüsing, Journal of Applied Physics 131 (2022).","chicago":"Hegarty, Peter A., Henrik Beccard, Lukas M. Eng, and Michael Rüsing. “Turn All the Lights off: Bright- and Dark-Field Second-Harmonic Microscopy to Select Contrast Mechanisms for Ferroelectric Domain Walls.” <i>Journal of Applied Physics</i> 131, no. 24 (2022). <a href=\"https://doi.org/10.1063/5.0094988\">https://doi.org/10.1063/5.0094988</a>."},"doi":"10.1063/5.0094988","language":[{"iso":"eng"}],"main_file_link":[{"url":" https://doi.org/10.1063/5.0094988","open_access":"1"}],"article_type":"original","intvolume":"       131","publication_status":"published","date_updated":"2023-10-11T08:53:55Z","author":[{"first_name":"Peter A.","last_name":"Hegarty","full_name":"Hegarty, Peter A."},{"full_name":"Beccard, Henrik","first_name":"Henrik","last_name":"Beccard"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"}],"publication_identifier":{"issn":["0021-8979","1089-7550"]},"title":"Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls","year":"2022","keyword":["General Physics and Astronomy"],"type":"journal_article","date_created":"2023-10-11T08:53:25Z","extern":"1","abstract":[{"text":"Recent analyses by polarization resolved second-harmonic (SH) microscopy have demonstrated that ferroelectric (FE) domain walls (DWs) can possess non-Ising wall characteristics and topological nature. These analyses rely on locally analyzing the properties, directionality, and magnitude of the second-order nonlinear tensor. However, when inspecting FE DWs with SH microscopy, a manifold of different effects may contribute to the observed signal difference between domains and DWs, i.e., far-field interference, Čerenkov-type phase-matching (CSHG), and changes in the aforementioned local nonlinear optical properties. They all might be present at the same time and, therefore, require careful interpretation and separation. In this work, we demonstrate how the particularly strong Čerenkov-type contrast can selectively be blocked using dark- and bright-field SH microscopy. Based on this approach, we show that other contrast mechanisms emerge that were previously overlayed by CSHG but can now be readily selected through the appropriate experimental geometry. Using the methods presented, we show that the strength of the CSHG contrast compared to the other mechanisms is approximately 22 times higher. This work lays the foundation for the in-depth analysis of FE DW topologies by SH microscopy.","lang":"eng"}],"publication":"Journal of Applied Physics","issue":"24"},{"language":[{"iso":"eng"}],"article_number":"162901","doi":"10.1063/5.0086029","publication_identifier":{"issn":["0003-6951","1077-3118"]},"author":[{"last_name":"Reitzig","first_name":"Sven","full_name":"Reitzig, Sven"},{"first_name":"Franz","last_name":"Hempel","full_name":"Hempel, Franz"},{"full_name":"Ratzenberger, Julius","first_name":"Julius","last_name":"Ratzenberger"},{"first_name":"Peter A.","last_name":"Hegarty","full_name":"Hegarty, Peter A."},{"last_name":"Amber","first_name":"Zeeshan H.","full_name":"Amber, Zeeshan H."},{"full_name":"Buschbeck, Robin","last_name":"Buschbeck","first_name":"Robin"},{"full_name":"Rüsing, Michael","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577","id":"22501"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"year":"2022","title":"High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering","article_type":"original","intvolume":"       120","publication_status":"published","date_updated":"2023-10-11T08:50:42Z","date_created":"2023-10-11T08:50:06Z","keyword":["Physics and Astronomy (miscellaneous)"],"type":"journal_article","publication":"Applied Physics Letters","issue":"16","extern":"1","abstract":[{"lang":"eng","text":"Spontaneous Raman spectroscopy (SR) is a versatile method for analysis and visualization of ferroelectric crystal structures, including domain walls. Nevertheless, the necessary acquisition time makes SR impractical for in situ analysis and large scale imaging. In this work, we introduce broadband coherent anti-Stokes Raman spectroscopy (B-CARS) as a high-speed alternative to conventional Raman techniques and demonstrate its benefits for ferroelectric domain wall analysis. Using the example of poled lithium niobate, we compare the spectral output of both techniques in terms of domain wall signatures and imaging capabilities. We extract the Raman-like resonant part of the coherent anti-Stokes signal via a Kramers–Kronig-based phase retrieval algorithm and compare the raw and phase-retrieved signals to SR characteristics. Finally, we propose a mechanism for the observed domain wall signal strength that resembles a Čerenkov-like behavior, in close analogy to domain wall signatures obtained by second-harmonic generation imaging. We, thus, lay here the foundations for future investigations on other poled ferroelectric crystals using B-CARS."}],"publisher":"AIP Publishing","_id":"47982","volume":120,"user_id":"22501","status":"public","citation":{"mla":"Reitzig, Sven, et al. “High-Speed Hyperspectral Imaging of Ferroelectric Domain Walls Using Broadband Coherent Anti-Stokes Raman Scattering.” <i>Applied Physics Letters</i>, vol. 120, no. 16, 162901, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>.","bibtex":"@article{Reitzig_Hempel_Ratzenberger_Hegarty_Amber_Buschbeck_Rüsing_Eng_2022, title={High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering}, volume={120}, DOI={<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>}, number={16162901}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Reitzig, Sven and Hempel, Franz and Ratzenberger, Julius and Hegarty, Peter A. and Amber, Zeeshan H. and Buschbeck, Robin and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","ama":"Reitzig S, Hempel F, Ratzenberger J, et al. High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering. <i>Applied Physics Letters</i>. 2022;120(16). doi:<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>","ieee":"S. Reitzig <i>et al.</i>, “High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering,” <i>Applied Physics Letters</i>, vol. 120, no. 16, Art. no. 162901, 2022, doi: <a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>.","apa":"Reitzig, S., Hempel, F., Ratzenberger, J., Hegarty, P. A., Amber, Z. H., Buschbeck, R., Rüsing, M., &#38; Eng, L. M. (2022). High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering. <i>Applied Physics Letters</i>, <i>120</i>(16), Article 162901. <a href=\"https://doi.org/10.1063/5.0086029\">https://doi.org/10.1063/5.0086029</a>","chicago":"Reitzig, Sven, Franz Hempel, Julius Ratzenberger, Peter A. Hegarty, Zeeshan H. Amber, Robin Buschbeck, Michael Rüsing, and Lukas M. Eng. “High-Speed Hyperspectral Imaging of Ferroelectric Domain Walls Using Broadband Coherent Anti-Stokes Raman Scattering.” <i>Applied Physics Letters</i> 120, no. 16 (2022). <a href=\"https://doi.org/10.1063/5.0086029\">https://doi.org/10.1063/5.0086029</a>.","short":"S. Reitzig, F. Hempel, J. Ratzenberger, P.A. Hegarty, Z.H. Amber, R. Buschbeck, M. Rüsing, L.M. Eng, Applied Physics Letters 120 (2022)."},"quality_controlled":"1"},{"quality_controlled":"1","citation":{"short":"E. Singh, H. Beccard, Z.H. Amber, J. Ratzenberger, C.W. Hicks, M. Rüsing, L.M. Eng, Physical Review B 106 (2022).","chicago":"Singh, Ekta, Henrik Beccard, Zeeshan H. Amber, Julius Ratzenberger, Clifford W. Hicks, Michael Rüsing, and Lukas M. Eng. “Tuning Domain Wall Conductivity in Bulk Lithium Niobate by Uniaxial Stress.” <i>Physical Review B</i> 106, no. 14 (2022). <a href=\"https://doi.org/10.1103/physrevb.106.144103\">https://doi.org/10.1103/physrevb.106.144103</a>.","ieee":"E. Singh <i>et al.</i>, “Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress,” <i>Physical Review B</i>, vol. 106, no. 14, Art. no. 144103, 2022, doi: <a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>.","apa":"Singh, E., Beccard, H., Amber, Z. H., Ratzenberger, J., Hicks, C. W., Rüsing, M., &#38; Eng, L. M. (2022). Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress. <i>Physical Review B</i>, <i>106</i>(14), Article 144103. <a href=\"https://doi.org/10.1103/physrevb.106.144103\">https://doi.org/10.1103/physrevb.106.144103</a>","bibtex":"@article{Singh_Beccard_Amber_Ratzenberger_Hicks_Rüsing_Eng_2022, title={Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress}, volume={106}, DOI={<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>}, number={14144103}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Singh, Ekta and Beccard, Henrik and Amber, Zeeshan H. and Ratzenberger, Julius and Hicks, Clifford W. and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","ama":"Singh E, Beccard H, Amber ZH, et al. Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress. <i>Physical Review B</i>. 2022;106(14). doi:<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>","mla":"Singh, Ekta, et al. “Tuning Domain Wall Conductivity in Bulk Lithium Niobate by Uniaxial Stress.” <i>Physical Review B</i>, vol. 106, no. 14, 144103, American Physical Society (APS), 2022, doi:<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>."},"user_id":"22501","volume":106,"_id":"47986","publisher":"American Physical Society (APS)","status":"public","type":"journal_article","date_created":"2023-10-11T08:55:42Z","abstract":[{"lang":"eng","text":"Conductive domain walls (DWs) in insulating ferroelectrics have recently attracted considerable attention due to their unique topological, optical, and electronic properties, and offer potential applications such as in memory devices or rewritable circuitry. The electronic properties of DWs can be tuned by the application of strain, hence controlling the charge carrier density at DWs. In this paper, we study the influence of uniaxial stress on the conductivity of DWs in the bulk single crystal lithium niobate (LiNbO3). Using conductive atomic force microscopy, we observe a large asymmetry in the conductivity of DWs, where only negatively screened walls, so called head-to-head DWs, are becoming increasingly conductive, while positively screened, tail-to-tails DWs, show a decrease in conductivity. This asymmetry of DW conductivity agrees with our theoretical model based on the piezoelectric effect. In addition, we observed that the current in the DW increases up to an order of magnitude for smaller compressive stresses of 100 MPa. This response of DWs remained intact for multiple stress cycles over two months, opening a path for future applications."}],"extern":"1","issue":"14","publication":"Physical Review B","doi":"10.1103/physrevb.106.144103","article_number":"144103","language":[{"iso":"eng"}],"date_updated":"2023-10-11T08:56:09Z","publication_status":"published","intvolume":"       106","article_type":"original","title":"Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress","year":"2022","author":[{"full_name":"Singh, Ekta","last_name":"Singh","first_name":"Ekta"},{"full_name":"Beccard, Henrik","last_name":"Beccard","first_name":"Henrik"},{"last_name":"Amber","first_name":"Zeeshan H.","full_name":"Amber, Zeeshan H."},{"full_name":"Ratzenberger, Julius","first_name":"Julius","last_name":"Ratzenberger"},{"full_name":"Hicks, Clifford W.","first_name":"Clifford W.","last_name":"Hicks"},{"id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","first_name":"Michael"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."}],"publication_identifier":{"issn":["2469-9950","2469-9969"]}},{"citation":{"ieee":"H. Beccard <i>et al.</i>, “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls,” <i>ACS Applied Nano Materials</i>, vol. 5, no. 7, pp. 8717–8722, 2022, doi: <a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>.","apa":"Beccard, H., Kirbus, B., Beyreuther, E., Rüsing, M., Bednyakov, P., Hlinka, J., &#38; Eng, L. M. (2022). Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls. <i>ACS Applied Nano Materials</i>, <i>5</i>(7), 8717–8722. <a href=\"https://doi.org/10.1021/acsanm.2c01919\">https://doi.org/10.1021/acsanm.2c01919</a>","short":"H. Beccard, B. Kirbus, E. Beyreuther, M. Rüsing, P. Bednyakov, J. Hlinka, L.M. Eng, ACS Applied Nano Materials 5 (2022) 8717–8722.","chicago":"Beccard, Henrik, Benjamin Kirbus, Elke Beyreuther, Michael Rüsing, Petr Bednyakov, Jiří Hlinka, and Lukas M. Eng. “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls.” <i>ACS Applied Nano Materials</i> 5, no. 7 (2022): 8717–22. <a href=\"https://doi.org/10.1021/acsanm.2c01919\">https://doi.org/10.1021/acsanm.2c01919</a>.","mla":"Beccard, Henrik, et al. “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls.” <i>ACS Applied Nano Materials</i>, vol. 5, no. 7, American Chemical Society (ACS), 2022, pp. 8717–22, doi:<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>.","bibtex":"@article{Beccard_Kirbus_Beyreuther_Rüsing_Bednyakov_Hlinka_Eng_2022, title={Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls}, volume={5}, DOI={<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>}, number={7}, journal={ACS Applied Nano Materials}, publisher={American Chemical Society (ACS)}, author={Beccard, Henrik and Kirbus, Benjamin and Beyreuther, Elke and Rüsing, Michael and Bednyakov, Petr and Hlinka, Jiří and Eng, Lukas M.}, year={2022}, pages={8717–8722} }","ama":"Beccard H, Kirbus B, Beyreuther E, et al. Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls. <i>ACS Applied Nano Materials</i>. 2022;5(7):8717-8722. doi:<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>"},"quality_controlled":"1","_id":"47985","publisher":"American Chemical Society (ACS)","page":"8717-8722","volume":5,"user_id":"22501","status":"public","date_created":"2023-10-11T08:54:20Z","keyword":["General Materials Science"],"type":"journal_article","publication":"ACS Applied Nano Materials","issue":"7","extern":"1","abstract":[{"text":"Strongly charged head-to-head domain walls that are purposely engineered along the [110] crystallographic orientation into ferroelectric BaTiO3 single crystals have been proposed as intrinsically nanoscaled two-dimensional electron gases (2DEGs) because of their significant conductivity. Here, we quantify these 2DEG properties through dedicated Hall transport measurements in van der Pauw 4-point geometry, finding the electron mobility to reach around 400 cm2 (V s)^{−1}, while the two-dimensional charge density amounts to 7 × 103 cm^{–2}. We underline the necessity to take into account the thermal and geometrical misalignment offset voltages by evaluating the Hall resistance under magnetic field sweeps; otherwise, errors of several hundred percent in the derived transport parameters can occur.","lang":"eng"}],"language":[{"iso":"eng"}],"doi":"10.1021/acsanm.2c01919","author":[{"full_name":"Beccard, Henrik","last_name":"Beccard","first_name":"Henrik"},{"first_name":"Benjamin","last_name":"Kirbus","full_name":"Kirbus, Benjamin"},{"first_name":"Elke","last_name":"Beyreuther","full_name":"Beyreuther, Elke"},{"id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577"},{"full_name":"Bednyakov, Petr","first_name":"Petr","last_name":"Bednyakov"},{"full_name":"Hlinka, Jiří","last_name":"Hlinka","first_name":"Jiří"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."}],"publication_identifier":{"issn":["2574-0970","2574-0970"]},"year":"2022","title":"Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls","article_type":"original","intvolume":"         5","publication_status":"published","date_updated":"2023-10-11T08:55:16Z"},{"quality_controlled":"1","extern":"1","publication":"Optical Components and Materials XIX","citation":{"ieee":"J. Golde <i>et al.</i>, “Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography,” in <i>Optical Components and Materials XIX</i>, San Francisco, California, United States, 2022, doi: <a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>.","mla":"Golde, Jonas, et al. “Investigation of Ferroelectric Domain Walls in Periodically-Poled LiNbO3 Single Crystals by Polarization-Sensitive Optical Coherence Tomography.” <i>Optical Components and Materials XIX</i>, edited by Michel J. Digonnet and Shibin Jiang, SPIE, 2022, doi:<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>.","apa":"Golde, J., Rüsing, M., Kindler, R., Steuer, S., Rix, J., Eng, L. M., &#38; Koch, E. (2022). Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography. In M. J. Digonnet &#38; S. Jiang (Eds.), <i>Optical Components and Materials XIX</i>. SPIE. <a href=\"https://doi.org/10.1117/12.2608470\">https://doi.org/10.1117/12.2608470</a>","bibtex":"@inproceedings{Golde_Rüsing_Kindler_Steuer_Rix_Eng_Koch_2022, title={Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography}, DOI={<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>}, booktitle={Optical Components and Materials XIX}, publisher={SPIE}, author={Golde, Jonas and Rüsing, Michael and Kindler, Richard and Steuer, Svea and Rix, Jan and Eng, Lukas M. and Koch, Edmund}, editor={Digonnet, Michel J. and Jiang, Shibin}, year={2022} }","ama":"Golde J, Rüsing M, Kindler R, et al. Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography. In: Digonnet MJ, Jiang S, eds. <i>Optical Components and Materials XIX</i>. SPIE; 2022. doi:<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>","short":"J. Golde, M. Rüsing, R. Kindler, S. Steuer, J. Rix, L.M. Eng, E. Koch, in: M.J. Digonnet, S. Jiang (Eds.), Optical Components and Materials XIX, SPIE, 2022.","chicago":"Golde, Jonas, Michael Rüsing, Richard Kindler, Svea Steuer, Jan Rix, Lukas M. Eng, and Edmund Koch. “Investigation of Ferroelectric Domain Walls in Periodically-Poled LiNbO3 Single Crystals by Polarization-Sensitive Optical Coherence Tomography.” In <i>Optical Components and Materials XIX</i>, edited by Michel J. Digonnet and Shibin Jiang. SPIE, 2022. <a href=\"https://doi.org/10.1117/12.2608470\">https://doi.org/10.1117/12.2608470</a>."},"type":"conference","date_created":"2023-10-11T08:47:26Z","date_updated":"2023-10-11T08:49:43Z","publication_status":"published","status":"public","title":"Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography","year":"2022","conference":{"name":"Optical Components and Materials XIX","start_date":"2022","location":"San Francisco, California, United States"},"author":[{"last_name":"Golde","first_name":"Jonas","full_name":"Golde, Jonas"},{"id":"22501","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael"},{"full_name":"Kindler, Richard","first_name":"Richard","last_name":"Kindler"},{"full_name":"Steuer, Svea","last_name":"Steuer","first_name":"Svea"},{"full_name":"Rix, Jan","first_name":"Jan","last_name":"Rix"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"full_name":"Koch, Edmund","last_name":"Koch","first_name":"Edmund"}],"doi":"10.1117/12.2608470","user_id":"22501","editor":[{"last_name":"Digonnet","first_name":"Michel J.","full_name":"Digonnet, Michel J."},{"first_name":"Shibin","last_name":"Jiang","full_name":"Jiang, Shibin"}],"publisher":"SPIE","_id":"47981","language":[{"iso":"eng"}]},{"intvolume":"       132","article_type":"original","date_updated":"2023-10-11T09:01:37Z","publication_status":"published","publication_identifier":{"issn":["0021-8979","1089-7550"]},"author":[{"first_name":"Zeeshan H.","last_name":"Amber","full_name":"Amber, Zeeshan H."},{"full_name":"Spychala, Kai J.","last_name":"Spychala","first_name":"Kai J."},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."},{"full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","first_name":"Michael","last_name":"Rüsing","id":"22501"}],"year":"2022","title":"Nonlinear optical interactions in focused beams and nanosized structures","doi":"10.1063/5.0125926","language":[{"iso":"eng"}],"main_file_link":[{"url":" https://doi.org/10.1063/5.0125926","open_access":"1"}],"article_number":"213102","abstract":[{"lang":"eng","text":"Thin-film materials from μm thickness down to single-atomic-layered 2D materials play a central role in many novel electronic and optical applications. Coherent, nonlinear optical (NLO) μ-spectroscopy offers insight into the local thickness, stacking order, symmetry, or electronic and vibrational properties. Thin films and 2D materials are usually supported on multi-layered substrates leading to (multi-)reflections, interference, or phase jumps at interfaces during μ-spectroscopy, which all can make the interpretation of experiments particularly challenging. The disentanglement of the influence parameters can be achieved via rigorous theoretical analysis. In this work, we compare two self-developed modeling approaches, a semi-analytical and a fully vectorial model, to experiments carried out in thin-film geometry for two archetypal NLO processes, second-harmonic and third-harmonic generation. In particular, we demonstrate that thin-film interference and phase matching do heavily influence the signal strength. Furthermore, we work out key differences between three and four photon processes, such as the role of the Gouy-phase shift and the focal position. Last, we can show that a relatively simple semi-analytical model, despite its limitations, is able to accurately describe experiments at a significantly lower computational cost as compared to a full vectorial modeling. This study lays the groundwork for performing quantitative NLO μ-spectroscopy on thin films and 2D materials, as it identifies and quantifies the impact of the corresponding sample and setup parameters on the NLO signal, in order to distinguish them from genuine material properties.<"}],"issue":"21","publication":"Journal of Applied Physics","type":"journal_article","keyword":["General Physics and Astronomy"],"date_created":"2023-10-11T08:59:23Z","status":"public","volume":132,"user_id":"22501","_id":"47989","publisher":"AIP Publishing","funded_apc":"1","quality_controlled":"1","citation":{"bibtex":"@article{Amber_Spychala_Eng_Rüsing_2022, title={Nonlinear optical interactions in focused beams and nanosized structures}, volume={132}, DOI={<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>}, number={21213102}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Amber, Zeeshan H. and Spychala, Kai J. and Eng, Lukas M. and Rüsing, Michael}, year={2022} }","ama":"Amber ZH, Spychala KJ, Eng LM, Rüsing M. Nonlinear optical interactions in focused beams and nanosized structures. <i>Journal of Applied Physics</i>. 2022;132(21). doi:<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>","mla":"Amber, Zeeshan H., et al. “Nonlinear Optical Interactions in Focused Beams and Nanosized Structures.” <i>Journal of Applied Physics</i>, vol. 132, no. 21, 213102, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>.","chicago":"Amber, Zeeshan H., Kai J. Spychala, Lukas M. Eng, and Michael Rüsing. “Nonlinear Optical Interactions in Focused Beams and Nanosized Structures.” <i>Journal of Applied Physics</i> 132, no. 21 (2022). <a href=\"https://doi.org/10.1063/5.0125926\">https://doi.org/10.1063/5.0125926</a>.","short":"Z.H. Amber, K.J. Spychala, L.M. Eng, M. Rüsing, Journal of Applied Physics 132 (2022).","ieee":"Z. H. Amber, K. J. Spychala, L. M. Eng, and M. Rüsing, “Nonlinear optical interactions in focused beams and nanosized structures,” <i>Journal of Applied Physics</i>, vol. 132, no. 21, Art. no. 213102, 2022, doi: <a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>.","apa":"Amber, Z. H., Spychala, K. J., Eng, L. M., &#38; Rüsing, M. (2022). Nonlinear optical interactions in focused beams and nanosized structures. <i>Journal of Applied Physics</i>, <i>132</i>(21), Article 213102. <a href=\"https://doi.org/10.1063/5.0125926\">https://doi.org/10.1063/5.0125926</a>"},"oa":"1"},{"oa":"1","quality_controlled":"1","citation":{"ama":"Li Y, Hegarty PA, Rüsing M, Eng LM, Ruck M. Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation. <i>Zeitschrift für anorganische und allgemeine Chemie</i>. 2022;648(21). doi:<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>","bibtex":"@article{Li_Hegarty_Rüsing_Eng_Ruck_2022, title={Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation}, volume={648}, DOI={<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>}, number={21e2022001}, journal={Zeitschrift für anorganische und allgemeine Chemie}, publisher={Wiley}, author={Li, Yuxi and Hegarty, Peter A. and Rüsing, Michael and Eng, Lukas M. and Ruck, Michael}, year={2022} }","mla":"Li, Yuxi, et al. “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation.” <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i>, vol. 648, no. 21, e2022001, Wiley, 2022, doi:<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>.","chicago":"Li, Yuxi, Peter A. Hegarty, Michael Rüsing, Lukas M. Eng, and Michael Ruck. “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation.” <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i> 648, no. 21 (2022). <a href=\"https://doi.org/10.1002/zaac.202200193\">https://doi.org/10.1002/zaac.202200193</a>.","short":"Y. Li, P.A. Hegarty, M. Rüsing, L.M. Eng, M. Ruck, Zeitschrift Für Anorganische Und Allgemeine Chemie 648 (2022).","apa":"Li, Y., Hegarty, P. A., Rüsing, M., Eng, L. M., &#38; Ruck, M. (2022). Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation. <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i>, <i>648</i>(21), Article e2022001. <a href=\"https://doi.org/10.1002/zaac.202200193\">https://doi.org/10.1002/zaac.202200193</a>","ieee":"Y. Li, P. A. Hegarty, M. Rüsing, L. M. Eng, and M. Ruck, “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation,” <i>Zeitschrift für anorganische und allgemeine Chemie</i>, vol. 648, no. 21, Art. no. e2022001, 2022, doi: <a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>."},"volume":648,"user_id":"22501","publisher":"Wiley","_id":"47987","status":"public","keyword":["Inorganic Chemistry"],"type":"journal_article","date_created":"2023-10-11T08:56:26Z","abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>Pure samples of colorless, air‐stable Ba(BO<jats:sub>2</jats:sub>OH) crystals were obtained from Ba(NO<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub> and H<jats:sub>3</jats:sub>BO<jats:sub>3</jats:sub> under the ultra‐alkaline conditions of a KOH hydroflux at about 250 °C. The product formation depends on the water‐base molar ratio and the molar ratio of the starting materials. B(OH)<jats:sub>3</jats:sub> acts as a proton donor (Brønsted acid) rather than a hydroxide acceptor (Lewis acid). Ba(BO<jats:sub>2</jats:sub>OH) crystallizes in the non‐centrosymmetric orthorhombic space group <jats:italic>P</jats:italic>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>. Hydrogen bonds connect the almost planar (BO<jats:sub>2</jats:sub>OH)<jats:sup>2−</jats:sup> anions, which are isostructural to HCO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, into a syndiotactic chain. IR and Raman spectroscopy confirm the presence of hydroxide groups, which are involved in weak hydrogen bonds. Upon heating in air to about 450 °C, Ba(BO<jats:sub>2</jats:sub>OH) dehydrates to Ba<jats:sub>2</jats:sub>B<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>. Moreover, the non‐centrosymmetric structure of Ba(BO<jats:sub>2</jats:sub>OH) crystals was verified with power‐dependent confocal Second Harmonic Generation (SHG) microscopy indicating large conversion efficiencies in ambient atmosphere.</jats:p>","lang":"eng"}],"extern":"1","publication":"Zeitschrift für anorganische und allgemeine Chemie","issue":"21","doi":"10.1002/zaac.202200193","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/zaac.202200193"}],"article_number":" e2022001","intvolume":"       648","article_type":"original","date_updated":"2023-10-11T08:59:51Z","publication_status":"published","publication_identifier":{"issn":["0044-2313","1521-3749"]},"author":[{"full_name":"Li, Yuxi","first_name":"Yuxi","last_name":"Li"},{"full_name":"Hegarty, Peter A.","last_name":"Hegarty","first_name":"Peter A."},{"full_name":"Rüsing, Michael","first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","id":"22501"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"full_name":"Ruck, Michael","last_name":"Ruck","first_name":"Michael"}],"year":"2022","title":"Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation"},{"abstract":[{"lang":"eng","text":"Second harmonic (SH) microscopy represents a powerful tool for the investigation of crystalline systems, such as ferroelectrics and their domain walls (DWs). Under the condition of normal dispersion, i.e., the refractive index at the SH wavelength is larger as compared to the refractive index at the fundamental wavelength, n(2ω)>n(ω), bulk crystals will generate no SH signal. Should the bulk, however, contain DWs, an appreciable SH signal will still be detectable at the location of DWs stemming from the Čerenkov mechanism. In this work, we demonstrate both how SH signals are generated in bulk media and how the Čerenkov mechanism can be inhibited by using anomalous dispersion, i.e., n(ω)<n(2ω). This allows us to quantitatively estimate the relative strength of the Čerenkov compared to other SH contrast mechanisms in DWs, such as the interference contrast. The results are in agreement with previous experiments based on the geometric separation of the signals. Due to the observed, strong Čerenkov contrast, such signal contributions may not be neglected in polarimetry studies of ferroelectric DWs in the future."}],"extern":"1","publication":"Journal of Applied Physics","issue":"21","type":"journal_article","keyword":["General Physics and Astronomy"],"date_created":"2023-10-11T08:57:55Z","intvolume":"       132","article_type":"original","date_updated":"2023-10-11T08:58:50Z","publication_status":"published","author":[{"full_name":"Hegarty, Peter A.","last_name":"Hegarty","first_name":"Peter A."},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."},{"id":"22501","full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","first_name":"Michael","last_name":"Rüsing"}],"publication_identifier":{"issn":["0021-8979","1089-7550"]},"year":"2022","title":"Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion","doi":"10.1063/5.0115673","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":" https://doi.org/10.1063/5.0115673"}],"quality_controlled":"1","citation":{"short":"P.A. Hegarty, L.M. Eng, M. Rüsing, Journal of Applied Physics 132 (2022) 214102.","chicago":"Hegarty, Peter A., Lukas M. Eng, and Michael Rüsing. “Tuning the Čerenkov Second Harmonic Contrast from Ferroelectric Domain Walls via Anomalous Dispersion.” <i>Journal of Applied Physics</i> 132, no. 21 (2022): 214102. <a href=\"https://doi.org/10.1063/5.0115673\">https://doi.org/10.1063/5.0115673</a>.","apa":"Hegarty, P. A., Eng, L. M., &#38; Rüsing, M. (2022). Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion. <i>Journal of Applied Physics</i>, <i>132</i>(21), 214102. <a href=\"https://doi.org/10.1063/5.0115673\">https://doi.org/10.1063/5.0115673</a>","ieee":"P. A. Hegarty, L. M. Eng, and M. Rüsing, “Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion,” <i>Journal of Applied Physics</i>, vol. 132, no. 21, p. 214102, 2022, doi: <a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>.","ama":"Hegarty PA, Eng LM, Rüsing M. Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion. <i>Journal of Applied Physics</i>. 2022;132(21):214102. doi:<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>","bibtex":"@article{Hegarty_Eng_Rüsing_2022, title={Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion}, volume={132}, DOI={<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>}, number={21}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Hegarty, Peter A. and Eng, Lukas M. and Rüsing, Michael}, year={2022}, pages={214102} }","mla":"Hegarty, Peter A., et al. “Tuning the Čerenkov Second Harmonic Contrast from Ferroelectric Domain Walls via Anomalous Dispersion.” <i>Journal of Applied Physics</i>, vol. 132, no. 21, AIP Publishing, 2022, p. 214102, doi:<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>."},"oa":"1","status":"public","volume":132,"user_id":"22501","_id":"47988","publisher":"AIP Publishing","funded_apc":"1","page":"214102"},{"abstract":[{"text":"The intelligibility of demodulated audio signals from analog high frequency transmissions, e.g., using single-sideband\r\n(SSB) modulation, can be severely degraded by channel distortions and/or a mismatch between modulation and demodulation carrier frequency. In this work a neural network (NN)-based approach for carrier frequency offset (CFO) estimation from demodulated SSB signals is proposed, whereby a task specific architecture is presented. Additionally, a simulation framework for SSB signals is introduced and utilized for training the NNs. The CFO estimator is combined with a speech enhancement network to investigate its influence on the enhancement performance. The NN-based system is compared to a recently proposed pitch tracking based approach on publicly available data from real high frequency transmissions. Experiments show that the NN exhibits good CFO estimation properties and results in significant improvements in speech intelligibility, especially when combined with a noise reduction network.","lang":"eng"}],"publication":"Proceedings of the 30th European Signal Processing Conference (EUSIPCO)","type":"conference","department":[{"_id":"54"}],"file":[{"success":1,"content_type":"application/pdf","file_id":"33472","date_updated":"2022-09-22T10:48:31Z","relation":"main_file","access_level":"closed","file_size":1231379,"file_name":"cfo.pdf","date_created":"2022-09-22T10:48:31Z","creator":"jensheit"}],"date_created":"2022-09-22T10:56:13Z","date_updated":"2023-10-26T08:15:57Z","publication_status":"accepted","year":"2022","title":"Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels","author":[{"full_name":"Heitkämper, Jens","last_name":"Heitkämper","first_name":"Jens","id":"27643"},{"id":"460","full_name":"Schmalenstroeer, Joerg","first_name":"Joerg","last_name":"Schmalenstroeer"},{"id":"242","first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold"}],"language":[{"iso":"eng"}],"quality_controlled":"1","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"file_date_updated":"2022-09-22T10:48:31Z","citation":{"apa":"Heitkämper, J., Schmalenstroeer, J., &#38; Haeb-Umbach, R. (n.d.). Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels. <i>Proceedings of the 30th European Signal Processing Conference (EUSIPCO)</i>. 30th European Signal Processing Conference (EUSIPCO), Belgrad.","ieee":"J. Heitkämper, J. Schmalenstroeer, and R. Haeb-Umbach, “Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels,” presented at the 30th European Signal Processing Conference (EUSIPCO), Belgrad.","short":"J. Heitkämper, J. Schmalenstroeer, R. Haeb-Umbach, in: Proceedings of the 30th European Signal Processing Conference (EUSIPCO), Belgrad, n.d.","chicago":"Heitkämper, Jens, Joerg Schmalenstroeer, and Reinhold Haeb-Umbach. “Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels.” In <i>Proceedings of the 30th European Signal Processing Conference (EUSIPCO)</i>. Belgrad, n.d.","mla":"Heitkämper, Jens, et al. “Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels.” <i>Proceedings of the 30th European Signal Processing Conference (EUSIPCO)</i>.","ama":"Heitkämper J, Schmalenstroeer J, Haeb-Umbach R. Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels. In: <i>Proceedings of the 30th European Signal Processing Conference (EUSIPCO)</i>.","bibtex":"@inproceedings{Heitkämper_Schmalenstroeer_Haeb-Umbach, place={Belgrad}, title={Neural Network Based Carrier Frequency Offset Estimation From Speech Transmitted Over High Frequency Channels}, booktitle={Proceedings of the 30th European Signal Processing Conference (EUSIPCO)}, author={Heitkämper, Jens and Schmalenstroeer, Joerg and Haeb-Umbach, Reinhold} }"},"place":"Belgrad","has_accepted_license":"1","status":"public","conference":{"start_date":"2022-08-29","name":"30th European Signal Processing Conference (EUSIPCO)","location":"Belgrad","end_date":"2022-09-02"},"ddc":["000"],"user_id":"460","_id":"33471"}]