THz Emission Spectroscopy of Surface Photogalvanic Effects in a Chiral Weyl Semimetal

ORAL

Abstract

Topological materials, and Weyl semimetals in particular, exhibit diverse optical effects. If inversion symmetry is broken, second order responses are allowed, expanding the number of methods that can be used to probe the optical properties of a material. These second order effects are also allowed at material interfaces, providing a unique tool to study their topologically important surface states. Here, we present photogalvanic effect data collected via terahertz emission spectroscopy on a chiral Weyl semimetal as a function of polarization and incident wavelength and discuss how our data reveal signatures of the topologically relevant surface states.

–

Presenters

  • Darius Torchinsky

    • Temple University
    • Temple Univ
    • Department of Physics, Temple University

Authors

  • Darius Torchinsky

    • Temple University
    • Temple Univ
    • Department of Physics, Temple University

  • Baozhu Lu

    • Temple University
    • Temple Univ
    • Department of Physics, Temple University

  • Dylan Rees

    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley
    • University of California, Berkeley and LBL

  • Kaustuv Manna

    • Solid State Chemistry, Max Planck Institute Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids
    • Max-Planck-Institute for Chemical Physics of Solids , Nöthnitzer Straße-40, 01187 Dresden, Germany
    • Max-Planck-Institute for Chemical Physics of Solids
    • MPI, Dresden

  • Horst Borrmann

    • Max-Planck-Institute for Chemical Physics of Solids
    • MPI-CPfS Dresden
    • Max Planck Institute for Chemical Physics of Solids
    • MPI, Dresden

  • Claudia Felser

    • Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids
    • Max-Planck Institute for Chemical Physics of Solids
    • Max-Planck-Institute for Chemical Physics of Solids
    • Chemical Physics of Solids, Max Planck Institute
    • MPI, Dresden

  • Joseph Orenstein

    • University of California, Berkeley
    • physics, University of California, Berkeley
    • Department of Physics, University of California, Berkeley
    • University of California, Berkeley and LBL