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Evidence for Strong Electron-Phonon Coupling in Weyl Semimetals

ORAL

Abstract

Since the experimental discovery of topological semimetals (TSM) there has been a flurry of activity focused on identifying signatures of topological transport. However, many of the transport properties display behavior that is dominated by non-topological interactions with the phonon system. A deeper understanding of these TSMs therefore requires investigation of the coupling between the topological electronic system and the non-topological vibrational system. In this presentation we discuss our recent temperature dependent Raman measurements on multiple TSMs which reveal unusual temperature dependence of the linewidths. These linewidths indicate strong electron-phonon coupling in these materials, and furthermore, they show a preponderance of optical phonon decay into electron-hole pairs which seems to be a relatively general feature in TSMs.

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Presenters

  • Gavin Osterhoudt

    Boston College

Authors

  • Gavin Osterhoudt

    Boston College

  • Christina Garcia

    John A. Paulson School of Engineering and Applied Sciences, Harvard University, Harvard University

  • Vincent Plisson

    Boston College

  • Jennifer Coulter

    Harvard University, Harvard, 1 John A. Paulson School of Engineering and Applied Sciences, Harvard University

  • Johannes Gooth

    MPI for chemical physics of solids, Dresden, Max Planck Institute for Chemical Physics of Solid, Max Planck Institute for Chemical Physics of Solids, Dresden, Germany, Chemical Physics of Solids, Max Planck Institute

  • Bing Shen

    Univ of California Los Angeles, the school of Physics, Sun Yat-Sen University

  • Ni Ni

    Univ of California Los Angeles, Physics, University of California, Los Angeles, Physics and Astronomy, UCLA, Department of Physics and Astronomy, University of California Los Angeles, University of California, Los Angeles, Department of Physics and Astronomy and California NanoSystems Institute, University of California, Department of Physics and Astronomy and California Nano Systems Institute, University of California, Los Angeles, CA 90095, USA, University of California Los Angeles, Department of Physics and Astronomy, University of California, Los Angeles

  • 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

  • Prineha Narang

    SEAS, Harvard University, Harvard University, John A. Paulson School of Engineering and Applied Sciences, Harvard University, School of Engineering and Applied Sciences, Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Harvard University; Aliro Technologies

  • Kenneth Burch

    Boston College, Boston college