Hubbard Model Physics in Transition Metal Dichalcogenide Moiré Bands

Wu, Fengcheng; Lovorn, Timothy; Tutuc, Emanuel; MacDonald, Allan H.

doi:10.1103/PhysRevLett.121.026402

Title: Hubbard Model Physics in Transition Metal Dichalcogenide Moiré Bands

Journal Article · Tue Jul 10 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.121.026402· OSTI ID:1466348

Wu, Fengcheng ^[1]; Lovorn, Timothy ^[2]; Tutuc, Emanuel ^[2]; MacDonald, Allan H. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Texas, Austin, TX (United States)

Flexible long period moire superlattices form in two-dimensional van der Waals crystals containing layers that differ slightly in lattice constant or orientation. In this Letter we show theoretically that isolated flat moire bands described by generalized triangular lattice Hubbard models are present in twisted transition metal dichalcogenide heterobilayers. The hopping and interaction strength parameters of the Hubbard model can be tuned by varying the twist angle and the three-dimensional dielectric environment. In conclusion, when the flat moire bands are partially filled, candidate many-body ground states at some special filling factors include spin-liquid states, quantum anomalous Hall insulators, and chiral d-wave superconductors.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Welch Foundation; University of Texas, Austin, Texas Advanced Computing Center; USDOE

Grant/Contract Number:: AC02-06CH11357; FG02-02ER45958; SC0012670

OSTI ID:: 1466348

Alternate ID(s):: OSTI ID: 1459699

Journal Information:: Physical Review Letters, Vol. 121, Issue 2; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 164 works

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