Raman study of lattice dynamics in Weyl semimetal TaAs
arXiv:1506.04509 · doi:10.1103/PhysRevB.92.064302
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 that are also most likely associated with multiple-phonon excitations. We also noticed a sizable B component for the spectral background, for which the origin remains unclear.
5 pages, 3 figures
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- Anomalous Phonon-mode Dependence in Polarized Raman Spectroscopy of Topological Weyl Semimetal TaP
- Comparative Raman study of Weyl semimetals TaAs, NbAs, TaP and NbP
- Intrinsic diamagnetism in the Weyl semimetal TaAs
- Phonon-limited carrier transport in the Weyl semimetal TaAs