Raman study of lattice dynamics in Weyl semimetal TaAs

H. W. Liu; P. Richard; Z. D. Song; L. X. Zhao; Z. Fang; G. -F. Chen; H. Ding

doi:10.1103/PhysRevB.92.064302

Raman study of lattice dynamics in Weyl semimetal TaAs

Materials Science 2015-08-12 v1 Strongly Correlated Electrons

Authors: H. W. Liu , P. Richard , Z. D. Song , L. X. Zhao , Z. Fang , G. -F. Chen , H. Ding

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Abstract

We report a polarized Raman study of Weyl semimetal TaAs. We observe all the optical phonons, with energies and symmetries consistent with our first-principles calculations. We detect additional excitations assigned to multiple-phonon excitations. These excitations are accompanied by broad peaks separated by 140~cm $^{-1}$ that are also most likely associated with multiple-phonon excitations. We also noticed a sizable B $_1$ component for the spectral background, for which the origin remains unclear.

Keywords

Weyl semimetal TaAs Raman spectroscopy lattice dynamics optical phonons first-principles calculation multiple-phonon excitations

Cite

@article{arxiv.1506.04509,
  title  = {Raman study of lattice dynamics in Weyl semimetal TaAs},
  author = {H. W. Liu and P. Richard and Z. D. Song and L. X. Zhao and Z. Fang and G. -F. Chen and H. Ding},
  journal= {arXiv preprint arXiv:1506.04509},
  year   = {2015}
}

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5 pages, 3 figures

Raman study of lattice dynamics in Weyl semimetal TaAs

Abstract

Keywords

Cite

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