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  Multiflat Bands and Strong Correlations in Twisted Bilayer Boron Nitride: Doping-Induced Correlated Insulator and Superconductor

Xian, L. D., Kennes, D. M., Tancogne-Dejean, N., Altarelli, M., & Rubio, A. (2019). Multiflat Bands and Strong Correlations in Twisted Bilayer Boron Nitride: Doping-Induced Correlated Insulator and Superconductor. Nano Letters, 19(8), 4934-4940. doi:10.1021/acs.nanolett.9b00986.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0003-A017-E Versions-Permalink: https://hdl.handle.net/21.11116/0000-0007-3FDE-A
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This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium,provided the author and source are cited.
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Calculational details, model analysis of general twist bilayer systems with massive Dirac Hamiltonian, twist angle dependency of the doping density required to achieve half-filling in TBBN, DFT band structures of unrelaxed TBBN with different twist angles, and polynomial fitting of the bandwidth of the top of valence bands in unrelax TBBN
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Electronic Supporting Information files are available without a subscription to ACS Web Editions. The American Chemical Society holds a copyright ownership interest in any copyrightable Supporting Information. Files available from the ACS website may be downloaded for personal use only. Users are not otherwise permitted to reproduce, republish, redistribute, or sell any Supporting Information from the ACS website, either in whole or in part, in either machine-readable form or any other form without permission from the American Chemical Society. For permission to reproduce, republish and redistribute this material, requesters must process their own requests via the RightsLink permission system. Information about how to use the RightsLink permission system can be found at http://pubs.acs.org/page/copyright/permissions.html.
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https://arxiv.org/abs/1812.08097 (Preprint)
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 Urheber:
Xian, L. D.1, Autor           
Kennes, D. M.2, Autor
Tancogne-Dejean, N.1, Autor           
Altarelli, M.1, Autor           
Rubio, A.1, 3, 4, Autor           
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, ou_persistent22              
3Nano-Bio Spectroscopy Group and ETSF, Universidad del País Vasco UPV/EHU, ou_persistent22              
4Center for Computational Quantum Physics (CCQ),The Flatiron Institute, ou_persistent22              

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 Zusammenfassung: Two-dimensional materials, obtained by van der Waals stacking of layers, are fascinating objects of contemporary condensed matter research, exhibiting a variety of new physics. Inspired by the breakthroughs of twisted bilayer graphene (TBG), we demonstrate that twisted bilayer boron nitride (TBBN) is an even more exciting novel system that turns out to be an excellent platform to realize new correlated phases and phenomena; exploration of its electronic properties shows that in contrast to TBG in TBBN multiple families of 2,4, and 6-fold degenerate flat bands emerge without the need to fine tune close to a “magic angle”, resulting in dramatic and tunable changes in optical properties and exciton physics, and providing an additional platform to study strong correlations. Upon doping, unforeseen new correlated phases of matter (insulating and superconducting) emerge. TBBN could thus provide a promising experimental platform, insensitive to small deviations in the twist angle, to study novel exciton condensate and spatial confinement physics, and correlations in two dimensions.

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Sprache(n): eng - English
 Datum: 2019-06-222019-03-082019-07-012019-08-14
 Publikationsstatus: Erschienen
 Seiten: 7
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: arXiv: 1812.08097
DOI: 10.1021/acs.nanolett.9b00986
 Art des Abschluß: -

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Grant ID : 709382
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)

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Titel: Nano Letters
  Kurztitel : Nano Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: - Band / Heft: 19 (8) Artikelnummer: - Start- / Endseite: 4934 - 4940 Identifikator: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403