Charge density wave order in a nonsymmorphic crystal TaTe<sub>4</sub>

ORAL

Abstract

Charge density wave (CDW) orders may emerge in quantum materials due to a number of possible causes: Fermi surface nesting, electron-phonon coupling, and electron-electron interactions. Interestingly, CDW orders could also modify the crystalline symmetries of a material that affect symmetry-induced topological crossings. Here using state-of-the-art angle-resolved photoemission spectroscopy (ARPES), we decipher the electronic band structure of a quasi-1D nonsymmorphic compound TaTe4 in its (2a×2b×2c) CDW ground state. We will present experimental evidence of CDW-induced band folding that resolve previous contradictory conclusions between ARPES spectra and optical measurements. In addition, we will discuss the prospect of the crystalline symmetries introduced by the CDW order in this system towards realizing unconventional topological fermions.

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Presenters

  • Yichen Zhang

    • Rice University
    • Rice Univ

Authors

  • Yichen Zhang

    • Rice University
    • Rice Univ

  • Ruixiang Zhou

    • Shanghai Tech University

  • Hanlin Wu

    • University of Texas at Dallas
    • The University of Texas at Dallas

  • Ji Seop Oh

    • University of California, Berkeley
    • University of California Berkeley
    • University of California Berkeley; Rice University

  • Sheng Li

    • University of Texas at Dallas

  • Jonathan D Denlinger

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab

  • Makoto Hashimoto

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Lab

  • Donghui Lu

    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Laboratory
    • SLAC National Accelerator Lab

  • Sung-Kwan Mo

    • Lawrence Berkeley National Laboratory

  • Robert J Birgeneau

    • University of California, Berkeley

  • Gang Li

    • ShanghaiTech University

  • Bing Lv

    • University of Texas at Dallas

  • Ming Yi

    • Rice University
    • Rice Univ