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Large longitudinal circular photogalvanic effect in a chiral Weyl semimetal

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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