Correlated Chern States in Twisted MoTe₂ under Large External Magnetic Field

ORAL

Abstract

Exotic condensed-matter phenomena can arise when topology and magnetism intertwine with strong electron correlations. A prominent example is the recent observation of the fractional quantum anomalous Hall (FQAH) effect in twisted MoTe₂ homobilayers, a breakthrough that opens opportunities for investigating correlated topological states. In addition to FQAH states at zero magnetic field, applying high magnetic fields can unveil new correlated phases and clarify the topological and magnetic properties of remote bands. Here, we investigate the magneto-transport properties of ~3.3 degree twisted MoTe2 homobilayer under large external magnetic fields. In the high field regime, we observe a reentrant integer Chern insulator state and several additional insulating phases at distinct filling factors. We also observe a series of interruptions in Landau-levels at finite displacement fields, suggesting possible isospin or magnetic phase transitions.

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Presenters

  • Yifan Zhao

    • University of Washington

Authors

  • Yifan Zhao

    • University of Washington

  • Naiyuan James J Zhang

    • Brown University
    • University of Washington

  • Huiyuan Zheng

    • University of Washington

  • Heonjoon Park

    • University of Washington

  • Shuai Yuan

    • University of Washington

  • Chaowei Hu

    • University of California, Los Angeles
    • University of Washington

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Jiun-Haw Chu

    • University of Washington

  • Ting Cao

    • University of Washington

  • Di Xiao

    • University of Washington

  • Xiaodong Xu

    • University of Washington