Correlated insulating states in a multi-layer TMD heterostructure with two moiré interfaces

ORAL

Abstract

In moiré superlattices of transitional metal dichalcogenides (TMD), the enhanced Coulomb interaction gives rise to rich correlated electronic states such as Mott insulators and generalized Wigner crystals. When two moiré superlattices of nearly identical periodicities are stacked together, interlayer hopping is expected, which adds a new degree of freedom for the study of correlated many-body physics. In this talk, we study angle-aligned monolayer WS2/multilayer WSe2/monolayer WS2 heterostructure in a dual gate geometry and employ microwave impedance microscopy to probe the formation of insulating states. By applying a vertical electric field to tune the carrier distribution between the top and bottom moiré superlattices, we observe that certain insulating states disappear and reappear as a function of electric field, indicating possible competition and interaction between the two moiré superlattices.

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Presenters

  • Qiran Wu

    • University of California, Riverside

Authors

  • Qiran Wu

    • University of California, Riverside

  • Dongxue Chen

    • Rensselaer Polytechnic Institute
    • Rensselaer polytechnic institute
    • RPI

  • Yuze Meng

    • Rensselaer Polytechnic Institute

  • Zhen Lian

    • Rensselaer Polytechnic Institute
    • RPI

  • Xiong Huang

    • University of California, Riverside

  • Thinh Truong

    • University of California, Riverside

  • Lei Ma

    • Rensselaer Polytechnic Institute
    • Rensselaer polytechnic institute
    • RPI

  • Yan Li

    • Rensselaer Polytechnic Institute
    • Rensselaer polytechnic institute
    • RPI

  • Xinyue Chen

    • Rensselaer Polytechnic Institute

  • 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

  • Yongtao Cui

    • University of California, Riverside

  • Sufei Shi

    • Rensselaer Polytechnic Institute