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Article Dans Une Revue Physical Review X Année : 2022

Formation of an Electron-Phonon Bifluid in Bulk Antimony

Alexandre Jaoui
  • Fonction : Auteur
Adrien Gourgout
  • Fonction : Auteur
Gabriel Seyfarth
  • Fonction : Auteur
Alaska Subedi
Thomas Lorenz
  • Fonction : Auteur
Benoît Fauqué
  • Fonction : Auteur

Résumé

The flow of charge and entropy in solids usually depends on collisions decaying quasiparticle momentum. Hydrodynamic corrections can emerge, however, if most collisions among quasiparticles conserve momentum and the mean-free-path approaches the sample dimensions. Here, through a study of electrical and thermal transport in antimony (Sb) crystals of various sizes, we document the emergence of a two-component fluid of electrons and phonons. Lattice thermal conductivity is dominated by electron scattering down to 0.1 K and displays prominent quantum oscillations. The Dingle mobility does not vary despite an order-of-magnitude change in transport mobility. The Bloch-Grüneisen behavior of electrical resistivity is suddenly aborted below 15 K and replaced by a quadratic temperature dependence. At Kelvin temperature range, the phonon scattering time and the electron-electron scattering time display a similar amplitude and temperature dependence. Taken together, the results draw a consistent picture of a bi-fluid where frequent momentumconserving collisions between electrons and phonons dominate the transport properties.
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Dates et versions

hal-04028925 , version 1 (14-03-2023)

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Alexandre Jaoui, Adrien Gourgout, Gabriel Seyfarth, Alaska Subedi, Thomas Lorenz, et al.. Formation of an Electron-Phonon Bifluid in Bulk Antimony. Physical Review X, 2022, 12 (3), pp.031023. ⟨10.1103/PhysRevX.12.031023⟩. ⟨hal-04028925⟩
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