Raman Insights into the Phonon Dynamics of Weyl Semimetals

ORAL

Abstract

Weyl semimetals (WSM) are a recently realized class of topological materials with low energy electronic excitations characterized by a three-dimensional, linear dispersion. While much focus has been directed at characterizing and understanding the electronic properties of various WSMs, little attention has been paid to the vibrational properties. In the WSMs NbAs and TaAs such considerations are crucial for understanding the anomalously high mobility and thermal response. We present temperature and polarization dependent Raman spectra which reveal anomalous lineshapes, as well as deviations from standard anharmonic behavior.

*U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Award No. DE-SC0018675
US. Department of Energy, Photonics at Thermodynamic Limits Energy Frontier Research Center, Grant No. DE-SC0019140

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Presenters

  • Kenneth Burch

    • Boston College

Authors

  • Kenneth Burch

    • Boston College

  • Christina Garcia

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

  • Jennifer Coulter

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

  • Bing Shen

    • University of California Los Angeles
    • School of Physics, Sun Yat-Sen University, China
    • Univ of California Los Angeles

  • Ni Ni

    • Department of Physics and Astronomy, University of California, Los Angeles
    • University of California Los Angeles
    • University of California, Los Angeles

  • Prineha Narang

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

  • Gavin B Osterhoudt

    • Boston College