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.

–

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