Tunable Magnetic Interaction in Homobilayer Moiré TMDs

ORAL

Abstract

Transition metal dichalcogenide hetero- and homobilayer moiré systems have established themselves as a versatile platform for exploring Hubbard model physics. Their constituent monolayers are notable for a single spin-valley locked pseudospin degree of freedom. However, heterobilayer moiré systems intrinsically break the layer degree of freedom, and most TMDs transition from direct to indirect bandgap semiconductors in the bilayer, complicating homobilayer moiré physics. Here, we employ magneto-optical measurements to probe a near-AA stacked homobilayer MoTe2 moiré system. Doping dependent photoluminescence reveals electric field tunable correlated states, and demonstrates the retention of a direct bandgap at the K and K’ points in bilayer. Additional magnetic circular dichroism measurements show signatures of tunable magnetic interactions. The behavior demonstrated via this suite of optical probes establishes moiré MoTe­2 as a promising platform for observing correlated and topological physics.

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Presenters

  • Eric Anderson

    • University of Washington

Authors

  • Eric Anderson

    • University of Washington

  • Xiaodong Xu

    • University of Washington

  • Wang Yao

    • The University of Hong Kong

  • Feng-ren Fan

    • The University of Hong Kong

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan