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  Anisotropic phonon-mediated electronic transport in chiral Weyl semimetals

Garcia, C. A. C., Nenno, D. M., Varnavides, G., & Narang, P. (2021). Anisotropic phonon-mediated electronic transport in chiral Weyl semimetals. Physical Review Materials, 5(9): L091202, pp. 1-6. doi:10.1103/PhysRevMaterials.5.L091202.

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 Creators:
Garcia, Christina A. C.1, Author
Nenno, Dennis M.2, Author              
Varnavides, Georgios1, Author
Narang, Prineha1, Author
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1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: The discovery and observations of exotic, quantized optical and electrical responses have sparked renewed interest in nonmagnetic chiral crystals. Within this class of materials, six group V transition metal ditetrelides, that is, XY2 (X = V, Nb, Ta and Y = Si, Ge), host composite Weyl nodes on high-symmetry lines, with Kramers-Weyl fermions at time-reversal invariant momenta. In addition, at least two of these materials, NbGe2 and NbSi2, exhibit superconducting transitions at low temperatures. The interplay of strong electron-phonon interactions and complex Fermi-surface topology presents an opportunity to study both superconductivity and hydrodynamic electron transport in these systems. Towards this broader question, we present an ab initio theoretical study of the electronic transport and electron-phonon scattering in this family of materials, with a particular focus on NbGe2 vs NbSi2, and the other group V ditetrelides. We shed light on the microscopic origin of NbGe2's large and anisotropic room-temperature resistivity and contextualize its strong electron-phonon scattering with a presentation of other relevant scattering lifetimes, both momentum relaxing and momentum conserving. Our work explores the intriguing possibility of observing hydrodynamic electron transport in these chiral Weyl semimetals.

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Language(s): eng - English
 Dates: 2021-09-272021-09-27
 Publication Status: Published in print
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Title: Physical Review Materials
  Abbreviation : Phys. Rev. Mater.
Source Genre: Journal
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Publ. Info: College Park, MD : American Physical Society
Pages: - Volume / Issue: 5 (9) Sequence Number: L091202 Start / End Page: 1 - 6 Identifier: ISSN: 2475-9953
CoNE: https://pure.mpg.de/cone/journals/resource/2475-9953