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  Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS2 bilayers

Claassen, M., Xian, L. D., Kennes, D. M., & Rubio, A. (2022). Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS2 bilayers. Nature Communications, 13(1): 4915. doi:10.1038/s41467-022-31604-w.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0009-6AB4-5 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000B-F619-4
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https://arxiv.org/abs/2110.13370 (Preprint)
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 Urheber:
Claassen, M.1, Autor
Xian, L. D.2, 3, 4, Autor           
Kennes, D. M.3, 4, 5, Autor           
Rubio, A.3, 4, 6, Autor           
Affiliations:
1Department of Physics and Astronomy, University of Pennsylvania, ou_persistent22              
2Songshan Lake Materials Laboratory, ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Center for Free-Electron Laser Science, ou_persistent22              
5Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, ou_persistent22              
6Center for Computational Quantum Physics, Simons Foundation Flatiron Institute, ou_persistent22              

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 Zusammenfassung: We predict that twisted bilayers of 1T-ZrS2 realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS2 heterostructures give rise to an emergent and twist-controlled moiré Kagome lattice, combining geometric frustration and strong spin-orbit coupling to give rise to a moiré quantum spin Hall insulator with highly controllable and nearly-dispersionless bands. We devise a generic pseudo-spin theory for group-IV transition metal dichalcogenides that relies on the two-component character of the valence band maximum of the 1T structure at Γ, and study the emergence of a robust quantum anomalous Hall phase as well as possible fractional Chern insulating states from strong Coulomb repulsion at fractional fillings of the topological moiré Kagome bands. Our results establish group-IV transition metal dichalcogenide bilayers as a novel moiré platform to realize strongly-correlated topological phases in a twist-tunable setting.

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Sprache(n): eng - English
 Datum: 2021-10-122022-06-132022-08-22
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: arXiv: 2110.13370
DOI: 10.1038/s41467-022-31604-w
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Projektname : This work is supported by the European Research Council (ERC-2015-AdG-694097), Grupos Consolidados (IT1249-19), and SFB925. M.C. is supported by a startup grant from the University of Pennsylvania. A.R. is supported by the Flatiron Institute, a division of the Simons Foundation. We acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under RTG 1995, within the Priority Program SPP 2244 “2DMP”, under Germany’s Excellence Strategy - Cluster of Excellence and Advanced Imaging of Matter (AIM) EXC 2056 - 390715994 and RTG 2247. L.X. acknowledges the support from Distinguished Junior Fellowship program by the South Bay Interdisciplinary Science Center in the Songshan Lake Materials Laboratory and the Key-Area Research and Development Program of Guangdong Province of China (Grants No. 2020B0101340001). We acknowledge computational resources provided by the Simons Foundation Flatiron Institute, the Max Planck Computing and Data Facility, and the Platform for Data-Driven Computational Materials Discovery of the Songshan Lake laboratory. This work was supported by the Max Planck-New York City Center for Nonequilibrium Quantum Phenomena.
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Quelle 1

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Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 13 (1) Artikelnummer: 4915 Start- / Endseite: - Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723