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  Engineering Three-Dimensional Moiré Flat Bands

Xian, L. D., Fischer, A., Claassen, M., Zhang, J., Rubio, A., & Kennes, D. M. (2021). Engineering Three-Dimensional Moiré Flat Bands. Nano Letters, 21(18), 7519-7526. doi:10.1021/acs.nanolett.1c01684.

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acs.nanolett.1c01684.pdf (Publisher version), 7MB
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© The Authors. Published byAmerican Chemical Society
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Supporting Information: Further details on ab initio calculations, extended data for low-energy tight-binding models, theoretical details of multiorbital random-phase approximation (RPA), and linearized gap equation
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https://arxiv.org/abs/2012.09649 (Preprint)
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 Creators:
Xian, L. D.1, 2, 3, Author              
Fischer, A.4, Author
Claassen, M.5, Author
Zhang, J.2, 3, Author              
Rubio, A.2, 3, 6, 7, Author              
Kennes, D. M.2, 3, 4, Author              
Affiliations:
1Songshan Lake Materials Laboratory, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free Electron Laser Science, ou_persistent22              
4Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, ou_persistent22              
5Department of Physics and Astronomy, University of Pennsylvania, ou_persistent22              
6Center for Computational Quantum Physics, Simons Foundation Flatiron Institute, ou_persistent22              
7Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del País Vasco, UPV/EHU, ou_persistent22              

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Free keywords: Twisted moiré materials, Flat bands, Strongly correlated electrons, Superconductivity, Ab Initio calculations
 Abstract: Twisting two adjacent layers of van der Waals materials with respect to each other can lead to flat two-dimensional electronic bands which enables a wealth of physical phenomena. Here, we generalize this concept of so-called moiré flat bands to engineer flat bands in all three spatial dimensions controlled by the twist angle. The basic concept is to stack the material such that the large spatial moiré interference patterns are spatially shifted from one twisted layer to the next. We exemplify the general concept by considering graphitic systems, boron nitride, and WSe2, but the approach is applicable to any two-dimensional van der Waals material. For hexagonal boron nitride, we develop an ab initio fitted tight binding model that captures the corresponding three-dimensional low-energy electronic structure. We outline that interesting three-dimensional correlated phases of matter can be induced and controlled following this route, including quantum magnets and unconventional superconducting states.

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Language(s): eng - English
 Dates: 2021-08-252021-04-282021-09-132021-09-22
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2012.09649
DOI: 10.1021/acs.nanolett.1c01684
 Degree: -

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Project name : -
Grant ID : 886291
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 21 (18) Sequence Number: - Start / End Page: 7519 - 7526 Identifier: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403