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Topological Electronics and Materials - Publications Group leader: Dr. Christoph Kastl HOME PUBLICATIONS RESEARCH TEACHING Photovoltage and photocurrent absorption spectra of sulfur vacancies locally patterned in monolayer MoS2 Nano Letters accepted (2023) A. Hötger, W. Männer, T. Amit, D. Hernangómez-Pérez, T. Taniguchi , K. Watanabe, U. Wurstbauer, J.J. Finley, S. Refaely-Abramson, C. Kastl, A. Holleitner Spin-defect characteristics of single sulfur vacancies in monolayer MoS2 npj 2D materials and applications 7, 30 (2023) A. Hötger, T. Amit, J. Klein, K. Barthelmi, T. Pelini, A. Delhomme, S. Rey, M. Potemski, C. Faugeras, G. Cohen, D. Hernangomez-Perez, T. Taniguchi, K. Watanabe, C. Kastl, J.J. Finley, S. Refaely-Abramson, A.W. Holleitner, A.V. Stier Online Ref Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS2 The Journal of Physical Chemistry Letters 13, 10291 (2022) F. Sigger, I. Amersdorffer, A. Hötger, M. Nutz, J. Kiemle, T. Taniguchi, K. Watanabe, M. Förg, J. Noe, J.J. Finley, A. Högele, A. Holleitner, T. Hümmer, D. Hunger, C. Kastl Online Ref Exploring the phonon-assisted excitation mechanism of luminescent centres in hexagonal boron nitride by photoluminescence excitation spectroscopy submitted (2022) M. Fischer, A. Sajid, J. Iles-Smith, A. Hötger, D. I. Miakota, M.K. Svendsen, C. Kastl, S. Canulescu, S. Xiao, M. Wubs, K.S. Thygesen, A.W. Holleitner, N. Stenger Online Ref On-demand generation of optically active defects in monolayer WS2 by a focused helium ion beam Appl. Phys. Lett. 121, 183101 (2022) A. Micevic, N. Pettinger, A. Hötger, M. Florian, T. Taniguchi, K. Watanabe, K. Müller, J.J. Finley, C. Kastl, A.W. Holleitner Online Ref Picoseconds-Limited Exciton Recombination in Metal–Organic Chalcogenides Hybrid Quantum Wells ACS Nano 16, 3715–3722 (2022) C. Kastl, A. Schwartzberg, L. Maserati Online Ref Thickness and defect dependent electronic, optical and thermoelectric features of WTe2 Scientific Reports 12, 12756 (2022) I. Ozdemir, A. Holleitner, C. Kastl, O. Ü. Aktürk Online Ref Gate-Tunable Helical Currents in Commensurate Topological Insulator/Graphene Heterostructures ACS Nano 16, 12338 (2022) J. Kiemle, L. Powalla, K. Polyudov, L. Gulati, M. Singh, A. Holleitner, M. Burghard, C. Kastl, Online Ref Berry curvature-induced local spin polarisation in gated graphene/WTe2 heterostructures Nature Comm 13, 3152 (2022) L. Powalla, J. Kiemle, E. J. König, A. P. Schnyder, J. Knolle , K. Kern, A.W. Holleitner, C. Kastl, M. Burghard Online Ref Back To Top Defect-engineered magnetic field dependent optoelectronics of vanadium doped tungsten diselenide monolayers Advanced Optical Materials 10, 2102711 (2022) K. Nisi, J. Kiemle, L. Powalla, A. Scavuzzo, T. Dung Nguyen, T. Taniguchi, K. Watanabe, D. Loc Duong, M. Burghard, A.W. Holleitner, C. Kastl Online Ref Spin-dependent vibronic response of a carbon radical ion in two-dimensional WS2 Nature Comm. 12, 7287 (2021) K. A. Cochrane, J.-H. Lee, C. Kastl, J. B. Haber, T. Zhang, A. Kozhakhmetov, J. A. Robinson, M. Terrones, J. Repp, J. B. Neaton, A. Weber-Bargioni, and B. Schuler Online Ref Impact of domain disorder on optoelectronic properties of layered semimetal MoTe2 2D Materials 9, 011002 (2021) M. Singh, J. Kiemle, I. Ozdemir, P. Zimmermann, T. Taniguchi, K. Watanabe, M. Burghard, O. Üzengi Aktürk, C. Kastl, A. W. Holleitner Online Ref The role of chalcogen vacancies for atomic defect emission in MoS2 Nature Communications 12, 3822 (2021) E. Mitterreiter, B. Schuler, A. Micevic, D. Hernangómez-Pérez, K. Barthelmi, K. A. Cochrane, J. Kiemle, J. Klein, E. Wong, E. S. Barnard, M. Lorke, F. Jahnke, K. Watanabe, T. Taniguchi, J. J. Finley, A. M. Schwartzberg, D. Y. Qiu, S. Refaely-Abramson, A.W. Holleitner, A. Weber-Bargioni, C. Kastl Online Ref Gate-switchable arrays of quantum light emitters in contacted monolayer MoS2 van der Waals heterodevices Nano Letters 21, 1040 (2021) A. Hötger, J. Klein, K. Barthelmi, L. Sigl, F. Sigger, W. Männer, S. Gyger, M. Florian, M. Lorke, F. Jahnke, T. Taniguchi, K. Watanabe, K. D. Jöns, U. Wurstbauer, C. Kastl, K. Müller, J. J. Finley, A.W. Holleitner Online Ref Engineering the luminescence and generation of individual defect emitters in atomically thin MoS2 ACS Photonics 8, 669 (2021) J. Klein, L. Sigl, S. Gyger, K. Barthelmi, M. Florian, S. Rey, T. Taniguchi, K. Watanabe, F. Jahnke, C. Kastl, V. Zwiller, K.D. Jöns, K. Mueller, U. Wurstbauer, J. Finley, A.W. Holleitner Online Ref Structuring Semiconductor Materials with Atomic Precision Zeiss Microscopy November 2 (2020) E. Mitterreiter, C. Kastl, A.W. Holleitner Online Ref Atomistic Positioning of Defects in Helium Ion Treated Single-Layer MoS2 Nano Letters 20, 4437 (2020) E. Mitterreiter, B. Schuler, K. A. Cochrane, U. Wurstbauer, A. Weber-Bargioni, C. Kastl, A.W. Holleitner Online Ref Atomistic defects as single-photon emitters in atomically thin MoS2 APL Perspective 117, 070501 (2020) K. Barthelmi, J. Klein, A. Hötger, L. Sigl, F. Sigger, E. Mitterreiter, S. Rey, S. Gyger, M. Lorke, M. Florian, F. Jahnke, T. Taniguchi, K. Watanabe, V. Zwiller, K.D. Jöns, U. Wurstbauer, C. Kastl, A. Weber-Bargioni, J.J. Finley, K. Müller, A.W. Holleitner Online Ref Anisotropic 2D Excitons Unveiled in Organic-Inorganic Quantum Wells Materials Horizon (2020) L. Maserati, S. Refaely-Abramson, C. Kastl, C. T. Chen, N. Borys, C. N. Eisler, M. S. Collins, T. E. Smidt, E. S. Barnard, M. Strasbourg, B. Shevitski, K. Yao, E. A. Schriber, J. N. Hohman, P. J. Schuck, S. Aloni, J. Neaton, A. M. Schwartzberg Online Ref Light-field and spin-orbit-driven currents in van der Waals materials Nanophotonics 9, 2693 (2020) J. Kiemle, P. Zimmermann, A.W. Holleitner, C. Kastl Online Ref Back To Top Ultrafast and Local Optoelectronic Transport in Topological Insulators Physica Status Solidi (b) 258, 2000033 (2020) J. Kiemle, P. Seifert, A. W. Holleitner, C. Kastl Online Ref Large Spin-Orbit Splitting of Deep In-Gap Defect States of Engineered Sulfur Vacancies in Monolayer WS2 Phys. Rev. Lett. 123, 076801 (2019) B. Schuler, D. Y. Qiu, S. Refaely-Abramson, C. Kastl, C.T. Chen, S. Barja, R. J. Koch, D. F. Ogletree, S. Aloni, A. M. Schwartzberg, J. B. Neaton, S. G. Louie, A. Weber-Bargioni Online Ref How Substitutional Point Defects in Two-Dimensional WS2 Induce Charge Localization, Spin-Orbit Splitting, and Strain ACS nano (2019) B. Schuler, J. Lee, C. Kastl, K. A. Cochrane, C. T. Chen, S. Refaely-Abramson, S. Yuan, E. van Veen, R. Roldan, N. J. Borys, R. J. Koch, S. Aloni, A. M. Schwartzberg, D. F. Ogletree, J. B. Neaton, A.Weber-Bargioni Online Ref Identifying substitutional oxygen as a prolific point defect in monolayer transition metal dichalcogenides Nature Communications 10, 3382 (2019) S. Barja, S. Refaely-Abramson, B. Schuler, D. Y. Qiu, A. Pulkin, S. Wickenburg, H. Ryu, M. M. Ugeda, C. Kastl, C. Chen, C. Hwang, A. Schwartzberg, S. Aloni, S.-K. Mo, D. F. Ogletree, M. F. Crommie, O. V. Yazyev, S. G. Louie, J. B. Neaton, A. Weber-Bargioni Online Ref Quantized Conductance in Topological Insulators Revealed by the Shockley-Ramo Theorem Phys. Rev. Lett. 122, 146804 (2019) P. Seifert, M. Kundinger, G. Shi, X. He, K. Wu, Y. Li, A.W. Holleitner, C. Kastl Online Ref In-plane anisotropy of the photon-helicity induced linear Hall effect in few-layer WTe2 Physical Review B 99, 161403 (R) (2019) P. Seifert, F. Sigger, J. Kiemle, K. Watanabe, T. Taniguchi, C. Kastl, U. Wurstbauer, A.W. Holleitner Online Ref Disentangling the role of surface chemical interactions on interfacial charge transport at BiVO4 photoanodes ACS Appl. Mater. Interf. 10, 35129 (2018) J. Eichhorn, C. Kastl, A.M. Schwartzberg, I.D. Sharp, F.M. Toma Online Ref Nanoscale imaging of charge carrier transport limitations in BiVO4 photoanodes Nature Communications 9, 2597 (2018) J. Eichhorn, C. Kastl, J.K. Cooper, D. Ziegler, A.M. Schwartzberg, I.D. Sharp, F.M. Toma Material aspects of 3D topological insulators Encyclopedia of Interfacial Chemistry, 1st Edition (2017) P. Seifert, C. Kastl, A. Holleitner Online Ref Optoelectronics of topological surfaces Encyclopedia of Interfacial Chemistry, 1st Edition (2017) P. Seifert, C. Kastl, A. Holleitner Online Ref Symmetry and toplogy concepts Encyclopedia of Interfacial Chemistry, 1st Edition (2017) P. Seifert, C. Kastl, A. Holleitner Online Ref Back To Top Topological Insulators as Ultrafast Auston Switches in On-Chip THz-Circuits IEEE J. Sel. topics Quantum Electron. 23, 8700305 (2017) C. Kastl, C. Karnetzky, A. Brenneis, F. Langrieger, A. Holleitner Online Ref Quantized one-dimensional edge channels with strong spin-orbit coupling in 3D topological insulators No Reference given. (2015) C. Kastl, P. Seifert, X. He, K. Wu, Y. Li, A. Holleitner Online Ref Ultrafast helicity control of surface currents in topological insulators with near-unity fidelity Nature Communications 6, 6617 (2015) C. Kastl, C. Karnetzky, H. Karl, A. Holleitner Online Ref Chemical Potential Fluctuations in Topological Insulator BiSbTe Films Visualized by Photocurrent Spectroscopy 2D Materials 2 (2015) C. Kastl, P. Seifert, X. He, K. Wu, Y. Li, A. Holleitner Online Ref Optoelectronic transport through quantum Hall edge states New Journal of Physics 17, 23007 (2015) C. Kastl, M. Stallhofer, D. Schuh, W. Wegscheider, A. Holleitner Online Ref Enlarged magnetic focusing radius of photoinduced ballistic currents Phys. Rev. B 86, 115315 (2012) M. Stallhofer, C. Kastl, M. Brändlein, D. Schuh, W. Wegscheider, J. Kotthaus, G. Abstreiter, A. Holleitner Online Ref Local photocurrent generation in thin films of the topological insulator Bi2Se3 Applied Physics Letters 101, 251110 (2012) C. Kastl, T. Guan, X. Y. He, K. H. Wu, Y. Q. Li, A. Holleitner Online Ref Propagation length of mesoscopic photocurrents in a two-dimensional electron gas Phys. Rev. B 86, 115313 (2012) M. Stallhofer, C. Kastl, M. Brändlein, C. Karnetzky, D. Schuh, W. Wegscheider, A. Holleitner Online Ref