Quantum Spin Hall State in Monolayer 1T'-WTe2

ORAL

Abstract

Using molecular beam epitaxy (MBE), we successfully synthesized monolayer 1T’-WTe2 on graphitized SiC substrate. High-resolution angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling spectroscopy (STS) measurement are performed to investigate the electronic structure of monolayer 1T’-WTe2. Together with theoretical calculation and ARPES measurement, the band inversion which alters the band topology has been confirmed. The bulk gap opening due to the strong spin orbital coupling is clearly observed by ARPES and STS measurement. STS further provides evidences for a robust and modified electronic structure near the edge that is consistent with the expectations for a quantum spin Hall insulator.

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Presenters

  • Shujie Tang

    Stanford University, Lawrence Berkeley National Laboratory, SIMIS, Stanford University

Authors

  • Shujie Tang

    Stanford University, Lawrence Berkeley National Laboratory, SIMIS, Stanford University

  • Chaofan Zhang

    SIMIS, Stanford University, Stanford University

  • Chunjing Jia

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory, SIMIS, Stanford University, SLAC - Natl Accelerator Lab, Stanford University, Stanford Univ

  • Brian Moritz

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, SLAC and Stanford University, SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, SIMIS, Stanford University, Physics, Stanford University, Stanford Univ, SIMES, SLAC and Stanford University

  • hao yan

    SIMIS, Stanford University

  • Thomas Devereaux

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford Univ, SLAC and Stanford University, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, Stanford University, SIMIS, Stanford University, Physics, Stanford University, SLAC National Lab and Stanford University, SIMES, SLAC and Stanford University

  • Zhi-Xun Shen

    Stanford University, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, Stanford Univ, SIMIS, Stanford University, Applied Physics, Stanford Univ, Stanford University and SLAC National Accelerator Laboratory, Applied Physics, Stanford University

  • Dillon Wong

    Princeton University, Joseph Henry Laboratories & Department of Physics, Princeton University, UCB, Physics, Princeton University, Univ of California - Berkeley

  • Zahra Pedramrazi

    UCB, Univ of California - Berkeley

  • Hsin-Zon Tsai

    Physics, Univ of California - Berkeley, Univ of California - Berkeley, UCB, Physics, UC Berkeley, Physics, University of California, Berkeley, Department of physics, University of California - Berkeley

  • Salman Kahn

    Univ of California - Berkeley, UCB, Physics, University of California, Berkeley

  • Michael Crommie

    Physics, Univ of California - Berkeley, UC Berkeley and LBNL, Univ of California - Berkeley, UCB, Physics, UC Berkeley, Physics, University of California, Berkeley, Department of physics, University of California - Berkeley, Physics, University of California - Berkeley

  • Juan Jiang

    Oxford Unv., Lawrence Berkeley National Lab, Lawerence Berkeley National Lab

  • Yulin Chen

    Physics department, University of Oxford, University of Oxford, Oxford Unv., physics, university of oxford, Department of Physics, University of Oxford, Condensed Matter Physics, University of Oxford

  • Makoto Hashimoto

    SLAC, SLAC, Stanford University, SLAC National Laboratory, Stanford University, SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory, SSRL, SLAC

  • Donghui Lu

    SSRL/SLAC, SLAC, SLAC, Stanford University, SLAC National Laboratory, Stanford University, SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory, SSRL, SLAC

  • Robert Moore

    Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, SLAC, SLAC, Stanford University

  • Chan-Cuk hwang

    Pohang Accelerator Laboratory

  • Choongyu Hwang

    Pusan National University, Pusan Natl Univ

  • Miguel Ugeda

    CIC Nanogune

  • Zhi Liu

    Shanghai Institute of Microsystem and Information Technology, SIMIT,CAS, SIMIT

  • Xiaoming Xie

    SIMIT,CAS

  • Hyejin Ryu

    Lawrence Berkeley National Lab, Lawrence Berkeley National Laboratory, Lawrence Berkeley Natl Lab

  • Zahid Hussain

    Lawrence Berkeley National Lab, Lawrence Berkeley Natl Lab

  • Sung-Kwan Mo

    Lawrence Berkeley National Lab, Lawrence Berkeley Natl Lab, Lawrence Berkeley National Laboratory, Pohang Accelerator Laboratory, Advanced Light Source, Lawrence Berkeley National Laboratory