@article{53415, abstract = {{AbstractGiven a closed orientable hyperbolic manifold of dimension $$\ne 3$$ ≠ 3 we prove that the multiplicity of the Pollicott-Ruelle resonance of the geodesic flow on perpendicular one-forms at zero agrees with the first Betti number of the manifold. Additionally, we prove that this equality is stable under small perturbations of the Riemannian metric and simultaneous small perturbations of the geodesic vector field within the class of contact vector fields. For more general perturbations we get bounds on the multiplicity of the resonance zero on all one-forms in terms of the first and zeroth Betti numbers. Furthermore, we identify for hyperbolic manifolds further resonance spaces whose multiplicities are given by higher Betti numbers. }}, author = {{Küster, Benjamin and Weich, Tobias}}, issn = {{0010-3616}}, journal = {{Communications in Mathematical Physics}}, keywords = {{Mathematical Physics, Statistical and Nonlinear Physics}}, number = {{2}}, pages = {{917--941}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Pollicott-Ruelle Resonant States and Betti Numbers}}}, doi = {{10.1007/s00220-020-03793-2}}, volume = {{378}}, year = {{2020}}, } @article{35869, author = {{Keum, Changmin and Becker, David and Archer, Emily and Bock, Harald and Kitzerow, Heinz-Siegfried and Gather, Malte C. and Murawski, Caroline}}, issn = {{2195-1071}}, journal = {{Advanced Optical Materials}}, keywords = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}}, number = {{17}}, publisher = {{Wiley}}, title = {{{Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter}}}, doi = {{10.1002/adom.202000414}}, volume = {{8}}, year = {{2020}}, } @article{35859, author = {{Risse, Anna Margareta and Schmidtke, Jürgen and Kitzerow, Heinz-Siegfried}}, issn = {{0267-8292}}, journal = {{Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{7}}, pages = {{1025--1033}}, publisher = {{Informa UK Limited}}, title = {{{Dynamics of a liquid crystal-based modulator with germanium substrates for mid-infrared radiation}}}, doi = {{10.1080/02678292.2020.1839803}}, volume = {{48}}, year = {{2020}}, } @article{40577, author = {{Tian, Zhihong and Lopez Salas, Nieves and Liu, Chuntai and Liu, Tianxi and Antonietti, Markus}}, issn = {{2198-3844}}, journal = {{Advanced Science}}, keywords = {{General Physics and Astronomy, General Engineering, Biochemistry, Genetics and Molecular Biology (miscellaneous), General Materials Science, General Chemical Engineering, Medicine (miscellaneous)}}, number = {{24}}, publisher = {{Wiley}}, title = {{{C 2 N: A Class of Covalent Frameworks with Unique Properties}}}, doi = {{10.1002/advs.202001767}}, volume = {{7}}, year = {{2020}}, } @article{41023, abstract = {{AbstractEfficient oxygen evolution reaction (OER) electrocatalysts are pivotal for sustainable fuel production, where the Ni-Fe oxyhydroxide (OOH) is among the most active catalysts for alkaline OER. Electrolyte alkali metal cations have been shown to modify the activity and reaction intermediates, however, the exact mechanism is at question due to unexplained deviations from the cation size trend. Our X-ray absorption spectroelectrochemical results show that bigger cations shift the Ni2+/(3+δ)+ redox peak and OER activity to lower potentials (however, with typical discrepancies), following the order CsOH > NaOH ≈ KOH > RbOH > LiOH. Here, we find that the OER activity follows the variations in electrolyte pH rather than a specific cation, which accounts for differences both in basicity of the alkali hydroxides and other contributing anomalies. Our density functional theory-derived reactivity descriptors confirm that cations impose negligible effect on the Lewis acidity of Ni, Fe, and O lattice sites, thus strengthening the conclusions of an indirect pH effect.}}, author = {{Görlin, Mikaela and Halldin Stenlid, Joakim and Koroidov, Sergey and Wang, Hsin-Yi and Börner, Mia and Shipilin, Mikhail and Kalinko, Aleksandr and Murzin, Vadim and Safonova, Olga V. and Nachtegaal, Maarten and Uheida, Abdusalam and Dutta, Joydeep and Bauer, Matthias and Nilsson, Anders and Diaz-Morales, Oscar}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, keywords = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Key activity descriptors of nickel-iron oxygen evolution electrocatalysts in the presence of alkali metal cations}}}, doi = {{10.1038/s41467-020-19729-2}}, volume = {{11}}, year = {{2020}}, } @article{41024, author = {{Gujt, Jure and Zimmer, Peter and Zysk, Frederik and Süß, Vicky and Felser, Claudia and Bauer, Matthias and Kühne, Thomas}}, issn = {{2329-7778}}, journal = {{Structural Dynamics}}, keywords = {{Spectroscopy, Condensed Matter Physics, Instrumentation, Radiation}}, number = {{3}}, publisher = {{AIP Publishing}}, title = {{{Water structure near the surface of Weyl semimetals as catalysts in photocatalytic proton reduction}}}, doi = {{10.1063/4.0000008}}, volume = {{7}}, year = {{2020}}, } @article{40217, author = {{Wagenknecht, Inga and Meier-Gräwe, Uta}}, issn = {{2196-8225}}, journal = {{Praxis der Kinderpsychologie und Kinderpsychiatrie}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics}}, number = {{7}}, pages = {{643--665}}, publisher = {{Vandenhoeck & Ruprecht GmbH & Co, KG}}, title = {{{Psychische Auffälligkeiten bei Kindern und Jugendlichen, für die das Jugendamt in Anspruch genommen wurde}}}, doi = {{10.13109/prkk.2020.69.7.643}}, volume = {{69}}, year = {{2020}}, } @article{40271, author = {{Vergyris, Panagiotis and Babin, Charles and Nold, Raphael and Gouzien, Elie and Herrmann, Harald and Silberhorn, Christine and Alibart, Olivier and Tanzilli, Sébastien and Kaiser, Florian}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{2}}, publisher = {{AIP Publishing}}, title = {{{Two-photon phase-sensing with single-photon detection}}}, doi = {{10.1063/5.0009527}}, volume = {{117}}, year = {{2020}}, } @article{37934, author = {{Mukamel, Shaul and Freyberger, Matthias and Schleich, Wolfgang and Bellini, Marco and Zavatta, Alessandro and Leuchs, Gerd and Silberhorn, Christine and Boyd, Robert W and Sánchez-Soto, Luis Lorenzo and Stefanov, André and Barbieri, Marco and Paterova, Anna and Krivitsky, Leonid and Shwartz, Sharon and Tamasaku, Kenji and Dorfman, Konstantin and Schlawin, Frank and Sandoghdar, Vahid and Raymer, Michael and Marcus, Andrew and Varnavski, Oleg and Goodson, Theodore and Zhou, Zhi-Yuan and Shi, Bao-Sen and Asban, Shahaf and Scully, Marlan and Agarwal, Girish and Peng, Tao and Sokolov, Alexei V and Zhang, Zhe-Dong and Zubairy, M Suhail and Vartanyants, Ivan A and del Valle, Elena and Laussy, Fabrice}}, issn = {{0953-4075}}, journal = {{Journal of Physics B: Atomic, Molecular and Optical Physics}}, keywords = {{Condensed Matter Physics, Atomic and Molecular Physics, and Optics}}, number = {{7}}, publisher = {{IOP Publishing}}, title = {{{Roadmap on quantum light spectroscopy}}}, doi = {{10.1088/1361-6455/ab69a8}}, volume = {{53}}, year = {{2020}}, } @article{37932, abstract = {{Hybrid quantum information processing combines the advantages of discrete and continues variable protocols by realizing protocols consisting of photon counting and homodyne measurements. However, the mode structure of pulsed sources and the properties of the detection schemes often require the use of optical filters in order to combine both detection methods in a common experiment. This limits the efficiency and the overall achievable squeezing of the experiment. In our work, we use photon subtraction to implement the distillation of pulsed squeezed states originating from a genuinely spatially and temporally single-mode parametric down-conversion source in non-linear waveguides. Due to the distillation, we witness an improvement of 0.17 dB from an initial squeezing value of −1.648 ± 0.002 dB, while achieving a purity of 0.58, and confirm the non-Gaussianity of the distilled state via the higher-order cumulants. With this, we demonstrate the source’s suitability for scalable hybrid quantum network applications with pulsed quantum light.}}, author = {{Dirmeier, Thomas and Tiedau, Johannes and Khan, Imran and Ansari, Vahid and Müller, Christian R. and Silberhorn, Christine and Marquardt, Christoph and Leuchs, Gerd}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{21}}, publisher = {{Optica Publishing Group}}, title = {{{Distillation of squeezing using an engineered pulsed parametric down-conversion source}}}, doi = {{10.1364/oe.402178}}, volume = {{28}}, year = {{2020}}, } @article{41028, author = {{Naumova, Maria A. and Kalinko, Aleksandr and Wong, Joanne W. L. and Alvarez Gutierrez, Sol and Meng, Jie and Liang, Mingli and Abdellah, Mohamed and Geng, Huifang and Lin, Weihua and Kubicek, Katharina and Biednov, Mykola and Lima, Frederico and Galler, Andreas and Zalden, Peter and Checchia, Stefano and Mante, Pierre-Adrien and Zimara, Jennifer and Schwarzer, Dirk and Demeshko, Serhiy and Murzin, Vadim and Gosztola, David and Jarenmark, Martin and Zhang, Jianxin and Bauer, Matthias and Lawson Daku, Max Latevi and Khakhulin, Dmitry and Gawelda, Wojciech and Bressler, Christian and Meyer, Franc and Zheng, Kaibo and Canton, Sophie E.}}, issn = {{0021-9606}}, journal = {{The Journal of Chemical Physics}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}}, number = {{21}}, publisher = {{AIP Publishing}}, title = {{{Exploring the light-induced dynamics in solvated metallogrid complexes with femtosecond pulses across the electromagnetic spectrum}}}, doi = {{10.1063/1.5138641}}, volume = {{152}}, year = {{2020}}, } @article{40233, author = {{Meier, Lukas and Braun, Christian and Hannappel, Thomas and Schmidt, Wolf Gero}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}}, number = {{2}}, publisher = {{Wiley}}, title = {{{Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations}}}, doi = {{10.1002/pssb.202000463}}, volume = {{258}}, year = {{2020}}, } @article{40438, abstract = {{Semiconductor microcavities are frequently studied in the context of semiconductor lasers and in application-oriented fundamental research on topics such as linear and nonlinear polariton systems, polariton lasers, polariton pattern formation, and polaritonic Bose–Einstein condensates. A commonly used approach to describe theoretical properties includes a phenomenological single-mode equation that complements the equation for the nonlinear optical response (interband polarization) of the semiconductor. Here, we show how to replace the single-mode equation by a fully predictive transfer function method that, in contrast to the single-mode equation, accounts for propagation, retardation, and pulse-filtering effects of the incident light field traversing the distributed Bragg reflector (DBR) mirrors, without substantially increasing the numerical complexity of the solution. As examples, we use cavities containing GaAs quantum wells and transition-metal dichalcogenides (TMDs).}}, author = {{Carcamo, M. and Schumacher, Stefan and Binder, R.}}, issn = {{1559-128X}}, journal = {{Applied Optics}}, keywords = {{Atomic and Molecular Physics, and Optics, Engineering (miscellaneous), Electrical and Electronic Engineering}}, number = {{22}}, publisher = {{Optica Publishing Group}}, title = {{{Transfer function replacement of phenomenological single-mode equations in semiconductor microcavity modeling}}}, doi = {{10.1364/ao.392014}}, volume = {{59}}, year = {{2020}}, } @article{41519, abstract = {{AbstractDifferent studies have been demonstrated that the surface integrity of substrate bulk materials to be coated has a significant impact on the adhesion of thermally sprayed coatings. It is known that the surface integrity of parts processed by selective laser melting (SLM) differs from those obtained from bulk materials. Although 316L stainless steel is among the most investigated material for SLM, the adhesion of thermally sprayed coatings on 316L stainless steel substrates processed by SLM has not been studied yet. This study aims at evaluating the effect of various mechanical pre-treatments onto 316L stainless steel substrates processed by SLM and their effect on the adhesion of high velocity oxy-fuel (HVOF)-sprayed WC-Co coatings. To differentiate between topographical effects and residual stress-related phenomena, a stress-relief heat treatment of the SLM substrates served as a reference throughout the investigations. The differently pre-treated SLM substrates were investigated with regard to the surface roughness and residual stresses. For the HVOF-sprayed SLM composites, Vickers interfacial indentation tests were conducted to assess the resulting coating adhesion. The findings demonstrated that the HVOF-sprayed WC-Co coatings predominantly exhibit good adhesion to the SLM 316L substrates. However, it was found that the stress state in the SLM 316L substrate surface is more likely to affect the adhesion of the WC-Co coating, while the substrate surface roughness showed a marginal effect.}}, author = {{Tillmann, Wolfgang and Hagen, Leif and Schaak, Christoph and Liß, J. and Schaper, Mirko and Hoyer, Kay-Peter and Aydinöz, Mehmet Esat and Garthe, Kai-Uwe}}, issn = {{1059-9630}}, journal = {{Journal of Thermal Spray Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Condensed Matter Physics}}, number = {{6}}, pages = {{1396--1409}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Adhesion of HVOF-Sprayed WC-Co Coatings on 316L Substrates Processed by SLM}}}, doi = {{10.1007/s11666-020-01081-y}}, volume = {{29}}, year = {{2020}}, } @article{41518, author = {{Tillmann, Wolfgang and Hagen, Leif and Garthe, Kai-Uwe and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{0933-5137}}, journal = {{Materialwissenschaft und Werkstofftechnik}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, number = {{11}}, pages = {{1452--1464}}, publisher = {{Wiley}}, title = {{{Effect of substrate pre‐treatment on the low cycle fatigue performance of tungsten carbide‐cobalt coated additive manufactured 316 L substrates}}}, doi = {{10.1002/mawe.202000109}}, volume = {{51}}, year = {{2020}}, } @article{41520, author = {{Wu, Haoran and Bill, T. and Teng, Z.J. and Pramanik, Sudipta and Hoyer, Kay-Peter and Schaper, Mirko and Starke, Peter}}, issn = {{0921-5093}}, journal = {{Materials Science and Engineering: A}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, publisher = {{Elsevier BV}}, title = {{{Characterization of the fatigue behaviour for SAE 1045 steel without and with load-free sequences based on non-destructive, X-ray diffraction and transmission electron microscopic investigations}}}, doi = {{10.1016/j.msea.2020.139597}}, volume = {{794}}, year = {{2020}}, } @article{41521, author = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Stangier, Dominic and Hagen, Leif and Schaper, Mirko and Hengsbach, Florian and Hoyer, Kay-Peter}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Tribo-mechanical properties and adhesion behavior of DLC coatings sputtered onto 36NiCrMo16 produced by selective laser melting}}}, doi = {{10.1016/j.surfcoat.2020.125748}}, volume = {{394}}, year = {{2020}}, } @article{41522, author = {{Andreiev, Anatolii and Hoyer, Kay-Peter and Grydin, Olexandr and Frolov, Yaroslav and Schaper, Mirko}}, issn = {{0933-5137}}, journal = {{Materialwissenschaft und Werkstofftechnik}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, number = {{4}}, pages = {{517--530}}, publisher = {{Wiley}}, title = {{{Degradable silver‐based alloys}}}, doi = {{10.1002/mawe.201900191}}, volume = {{51}}, year = {{2020}}, } @article{39414, author = {{Anerot, Baptiste and Cresson, Jacky and Hariz Belgacem, Khaled and Pierret, Frederic}}, issn = {{0022-2488}}, journal = {{Journal of Mathematical Physics}}, keywords = {{Mathematical Physics, Statistical and Nonlinear Physics}}, number = {{11}}, publisher = {{AIP Publishing}}, title = {{{Noether’s-type theorems on time scales}}}, doi = {{10.1063/1.5140201}}, volume = {{61}}, year = {{2020}}, } @article{39399, author = {{Anerot, Baptiste and Cresson, Jacky and Hariz Belgacem, Khaled and Pierret, Frederic}}, issn = {{0022-2488}}, journal = {{Journal of Mathematical Physics}}, keywords = {{Mathematical Physics, Statistical and Nonlinear Physics}}, number = {{11}}, publisher = {{AIP Publishing}}, title = {{{Noether’s-type theorems on time scales}}}, doi = {{10.1063/1.5140201}}, volume = {{61}}, year = {{2020}}, }