The Low Energy Second Harmonic Generation Spectrum of the Chiral Multifold Fermion System RhSi

ORAL

Abstract

Lacking any mirror symmetries, the Weyl nodes of the multifold fermion system RhSi are offset in energy, permitting a spectroscopic study of the optical properties of a single node. The lack of any mirror symmetry also implies that RhSi lacks an inversion center and thus can support second order nonlinear optical processes in its bulk. Here, we present a spectroscopic study of one of these processes, the bulk second harmonic generation response as a function of incidence photon energy and measure the single SHG susceptibility tensor element χxyz over the 275 - 900 meV range. We describe how our results directly probe the nonlinear optical response of the isolated Weyl at the Γ point in the Brillouin zone and discuss our findings in the context of the linear optical response of the material.

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Presenters

  • Baozhu Lu

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

Authors

  • 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

  • Adolfo G Grushin

    • University Grenoble Alpes
    • Neel Institute (CNRS)
    • Univ. Grenoble Alpes, CNRS, Grenoble INP,Institut Néel
    • Néel Institute

  • 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

  • Darius Torchinsky

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