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  Evidence for Dominant Phonon-Electron Scattering in Weyl Semimetal WP2

Osterhoudt, G. B., Wang, Y., Garcia, C. A. C., Plisson, V. M., Gooth, J., Felser, C., et al. (2021). Evidence for Dominant Phonon-Electron Scattering in Weyl Semimetal WP2. Physical Review X, 11(1): 011017, pp. 1-10. doi:10.1103/PhysRevX.11.011017.

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 Creators:
Osterhoudt, Gavin B.1, Author
Wang, Yaxian1, Author
Garcia, Christina A. C.1, Author
Plisson, Vincent M.1, Author
Gooth, Johannes2, Author              
Felser, Claudia3, Author              
Narang, Prineha1, Author
Burch, Kenneth S.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nanostructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_3018212              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: Calculations, Decay (organic), Electron scattering, Electrons, Quantum chemistry, Topology, Transport properties, First-principles calculation, Intraband scattering, Phonon-phonon scattering, Scattering mechanisms, Specific properties, Temperature range, Temperature-dependent Raman spectroscopies, Transport phenomena, Phonons
 Abstract: Topological semimetals have revealed a wide array of novel transport phenomena, including electron hydrodynamics, quantum field theoretic anomalies, and extreme magnetoresistances and mobilities. However, the scattering mechanisms central to the fundamental transport properties remain largely unexplored. Here, we reveal signatures of significant phonon-electron scattering in the type-II Weyl semimetal WP2 via temperature-dependent Raman spectroscopy. Over a large temperature range, we find that the decay rates of the lowest energy A1 modes are dominated by phonon-electron rather than phonon-phonon scattering. In conjunction with first-principles calculations, a combined analysis of the momentum, energy, and symmetry-allowed decay paths indicates this results from finite momentum interband and intraband scattering of the electrons. The excellent agreement with theory further suggests that such results could be true for the acoustic modes. We thus provide evidence for the importance of phonons in the transport properties of topological semimetals and identify specific properties that may contribute to such behavior in other materials. © 2021 authors. Published by the American Physical Society.

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Language(s): eng - English
 Dates: 2021-01-272021-01-27
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevX.11.011017
 Degree: -

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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 11 (1) Sequence Number: 011017 Start / End Page: 1 - 10 Identifier: Other: 2160-3308
CoNE: https://pure.mpg.de/cone/journals/resource/2160-3308