Large longitudinal circular photogalvanic effect in a chiral Weyl semimetal

ORAL

Abstract

Breaking all of the mirror symmetries in a chiral Weyl semimetal lifts the energy
degeneracy of two Weyl points with opposite Chern numbers. One of the conse-
quences is the large or even quantized circular photogalvanic effect (CPGE)
, which originates from one of the Weyl points by keeping the other node
Pauli-blocked. Here, we report a large photocurrent generated by circularly
polarized light in a chiral Weyl semimetal. Symmetry analysis shows that
the photocurrent is consistent with the longitude CPGE in bulk. The second-order
conductivity spectrum of CPGE in near-infrared and mid-infrared regions is then obtained and
the condition of quantization is examined.

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Presenters

  • Zhuoliang Ni

    • Department of Physics & Astronomy, University of Pennsylvania

Authors

  • Zhuoliang Ni

    • Department of Physics & Astronomy, University of Pennsylvania

  • Kefeng Wang

    • University of Maryland, College Park
    • Brookhaven National Laboratory
    • Department of Physics, University of Maryland, College Park

  • Bing XU

    • Department of Physics, University of Fribourg

  • Xingyue Han

    • Department of Physics & Astronomy, University of Pennsylvania

  • 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

  • Johnpierre Paglione

    • University of Maryland, College Park
    • Physics Department, University of Maryland
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland College Park
    • Department of Physics, University of Maryland, College Park
    • University of Maryland, College Park & NIST
    • Univ of Maryland-Colege Park
    • Center for Quantum Materials, University of Maryland
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland-College Park,College Park, Maryland 20742

  • Claudia Felser

    • Max Planck Institute for Chemical Physics of Solids
    • MPI-CPfS Dresden
    • Max Planck Institute For Chemical and Physical Solids
    • MPI for chemical physics of solids, Dresden
    • Solid State Chemistry, Max Planck Institute Chemical Physics of Solids
    • Max Planck Institute
    • Max-Planck-Institute for Chemical Physics of Solids , Nöthnitzer Straße-40, 01187 Dresden, Germany
    • Max Planck Inst
    • Max Planck Dresden
    • Chemical Physics of Solids, Max Planck Institute

  • Liang Wu

    • Physics and Astronomy, University of Pennsylvania
    • Department of Physics & Astronomy, University of Pennsylvania
    • Department of Physics and Astronomy, University of Pennsylvania