APS Logo

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.

–

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