Evidence for quantum spin Hall effect in a new van der Waals monolayer

ORAL

Abstract

Inspired by fundamental and technological interest, extensive efforts have been devoted to predicting and identifying high-quality quantum spin Hall (QSH) insulators. The van der Waals (vdW) monolayer TaIrTe4 has been predicted to be a large-gap QSH insulator by first-principles calculations. However, experimental evidence has been so far lacking. Leveraging refined vdW device fabrication techniques, we access the intrinsic quantum electronic properties of monolayer TaIrTe4. In this talk, we report experimental evidence pointing to the QSH effect in the TaIrTe4 monolayer.

*The work was primarily supported by the AFOSR grant FA9550-22-1-0270 and the Center for the Advancement of Topological Materials (CATS), an EFRC funded by DOE, through the Ames Laboratory under contract DEAC02-07CH11358.

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Presenters

  • Jian Tang

    • Boston College

Authors

  • Jian Tang

    • Boston College

  • Siyuan Ding

    • Boston College

  • Hongyu Chen

    • Nanyang Technological University

  • Anyuan Gao

    • Harvard University

  • Tiema Qian

    • University of California, Los Angeles

  • Zumeng Huang

    • Boston College

  • Zhe Sun

    • Boston College

  • 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

  • David C Bell

    • Harvard University

  • Ziqiang Wang

    • Boston College

  • Liang Fu

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology
    • MIT

  • Yang Zhang

    • University of Tennessee, Knoxville
    • University of Tennessee
    • IAMM HQ, University of Tennessee Knoxville

  • Xiaofeng Qian

    • Texas A&M University

  • Kenneth S Burch

    • Boston College

  • Youguo Shi

    • Chinese Academy of Sciences
    • Institute of Physics, Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Ni Ni

    • University of California, Los Angeles

  • Guoqing Chang

    • Nanyang Technological University

  • Suyang Xu

    • Harvard University

  • Qiong Ma

    • Boston College