Angle-resolved photoemission study on potential topological insulator ZrTe$_5$

ORAL

Abstract

ZrTe$_5$ is a layered-structure material which is predicted to exhibit the quantum spin hall effect in its monolayer limit. Bulk ZrTe$_5$ material is of scientific interest as well, as it might lie within the transition boundary between weak and strong topological insulator. We are using angle-resolved photoemission spectroscopy (ARPES) to investigate the band structure of bulk ZrTe$_5$. Synchrotron data with varied photon energies shows little k$_z$ dependence, which indicates a quasi-two-dimensional band structure; in addition, we observe circular dichroism, which suggests possible spin polarization. We are also working on time-resolved ARPES measurements, hoping to reveal the band structure above the Fermi level, which might give information about the material’s topological properties.

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Authors

  • Hongyu Xiong

    • Stanford University and SLAC National Accelerator Laboratory

  • Jonathan Sobota

    • Stanford University, SLAC National Accelerator Laboratory, and Lawrence Berkeley National Laboratory

  • Shuolong Yang

    • Stanford University and SLAC National Accelerator Laboratory

  • Dominik Leuenberger

    • SLAC National Accelerator Laboratory

  • Hadas Soifer

    • SLAC National Accelerator Laboratory

  • Yan-Feng Chen

    • Nanjing University

  • Xu Han

    • Nanjing University

  • Si-Yuan Yu

    • Nanjing University

  • Ming-Hui Lu

    • Nanjing University

  • Makoto Hashimoto

    • SLAC National Accelerator Laboratory

  • Donghui Lu

    • SLAC National Accelerator Laboratory

  • Patrick Kirchmann

    • SLAC National Accelerator Laboratory

  • Zhi-Xun Shen

    • Stanford University and SLAC National Accelerator Laboratory