Electric field tunable correlated insulating states in AB stacked twisted MoTe<sub>2</sub>

ORAL

Abstract

Twisted MoTe2 homobilayer has emerged as an attractive platform for studying strong-correlation physics. A recent breakthrough is the observation of fractional quantum anomalous hall effect in AA stacked homobilayer. Compared to the AA stacking with a honeycomb moiré superlattice lattice and strong interlayer hybridization, AB stacked twisted homobilayer hosts a triangular lattice with negligible interlayer tunneling and well-defined layer degree of freedom. Here we study the AB stacked homobilayer using combined transport and optical measurements. We observe correlated insulating states at multiple fractional fillings of electrons and holes. In the electron side, a displacement field has no effect on the correlated states. In contrast, the states at fractional hole fillings exhibit transitions between correlated insulating states when electric field induces full layer pseudospin polarization, likely from the change of charge configuration. Our results reveal rich correlated physics in AB stacked MoTe2 homobilayer.

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Presenters

  • Weijie Li

    • University of Washington

Authors

  • Weijie Li

    • University of Washington

  • Heonjoon Park

    • University of Washington

  • Takashi Taniguchi

    • Kyoto Univ
    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Sciences
    • NIMS
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, NIMS, Japan
    • International Center for Materials Nanoarchitectonics, Tsukuba
    • National Institue for Materials Science
    • Kyoto University
    • National Institute of Materials Science
    • International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science

  • Wang Yao

    • The University of Hong Kong

  • Xiaodong Xu

    • University of Washington