Magnetotransport studies on topological insulator candidate: 1T'-WSe2

ORAL

Abstract

The family of 1T’-MX2 (M = W, Mo, and X = Te, Se, S) have been predicted to be Quantum Spin Hall Insulators (QSHI), hosting edge states that could realize dissipationless current transport at high temperatures. However, beyond WTe2, there has been no experimental verification of the spin-polarized edge states in the 1T’-MX2 family. Recent scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) studies have suggested that monolayer 1T’-WSe2 grown by molecular beam epitaxy hosts conductive edge states with a concomitant large bulk band gap (~129 meV). Here, we report on the synthesis of high quality 2M-WSe2 single crystals (the bulk stacking order of 1T’-WSe2 monolayer) and studies of the Fermiology. In addition, we will discuss the magnetotransport behavior and gate-tunability of few-layer devices.

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Publication: None

Presenters

  • Yangchen He

    • University of Wisconsin Madison
    • University of Wisconsin - Madison

Authors

  • Yangchen He

    • University of Wisconsin Madison
    • University of Wisconsin - Madison

  • Nicholas Pederson

    • University of Wisconsin - Madison

  • 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

  • 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

  • Shermane M Benjamin

    • The National High Magnetic Field Laboratory
    • The National High Magnetic Field Laboratory/Florida State University

  • Luis Balicas

    • National High Magnetic Field Laboratory
    • Florida State University, National High Magnetic Field Laboratory

  • Daniel Rhodes

    • University of Wisconsin - Madison