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Temperature-Induced Topological Phase Transition in Quasi-One-Dimensional Material Bi<sub>4</sub>I<sub>4</sub>

ORAL

Abstract

Quasi-one-dimensional materials provide a fascinating platform for studying diverse topological phases as well as related topological phase transitions. Bi4I4 is a quasi-one-dimension material with two different stacking sequences of the same building block along the c-axis, which results in two different structures – alpha-Bi4I4 and beta-Bi4I4. The two different phases are predicted to possess different topological properties including higher order hinge modes and can be tuned by temperature. Due to its quasi-one-dimensional nature, it can be cleaved along different surfaces hence be examined for strong versus weak topological insulator properties. In this talk, temperature dependent ARPES experimental results on different surfaces of Bi4I4 across the structural transition will be presented. Topological nature on different surfaces will be discussed for the alpha- and beta-Bi4I4 to elucidate the topological phase transition in this material system.

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Presenters

  • Jianwei Huang

    Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice Univ

Authors

  • Jianwei Huang

    Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice Univ

  • Sheng Li

    Department of Physics, University of Texas at Dallas, Physics, The University of Texas at Dallas, Department of Physics, The University of Texas at Dallas

  • Ji Seop Oh

    Department of Physics, University of California Berkeley

  • Han Wu

    Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice Univ

  • Xiaoyuan Liu

    Department of Physics, The University of Texas at Dallas

  • Yucheng Guo

    Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ

  • Yichen Zhang

    Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ

  • Makoto Hashimoto

    SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource, SLAC, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory,, SLAC National Accelerator Laboratory

  • Donghui Lu

    SLAC - Natl Accelerator Lab, SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource, SLAC, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory,, SLAC National Accelerator Laboratory

  • Jonathan Denlinger

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory, Advanced Light Source, Advanced Light Source, LBNL, Advanced light source, Advanced Light Source, Lawrence Berkeley National Lab

  • Robert J Birgeneau

    Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, University of California, Berkeley, Department of Physics, University of California Berkeley, Department of Physics, University of California, Berkeley

  • Fan Zhang

    University of Texas at Dallas, Department of Physics, The University of Texas at Dallas, University of Texas, Dallas, Department of Physics, University of Texas at Dallas

  • Bing Lv

    The University of Texas at Dallas, Department of Physics, University of Texas at Dallas, Physics, The University of Texas at Dallas, Department of Physics, The University of Texas at Dallas, University of Texas at Dallas

  • Ming Yi

    Rice University, Rice Univ, Department of Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice Univ