Universität zu Köln

Jaoui, Alexandre ORCID: 0000-0002-2894-2054, Gourgout, Adrien, Seyfarth, Gabriel, Subedi, Alaska ORCID: 0000-0001-7537-8196, Lorenz, Thomas ORCID: 0000-0003-4832-5157, Fauque, Benoit and Behnia, Kamran ORCID: 0000-0001-8997-5645 (2022). Formation of an Electron-Phonon Bifluid in Bulk Antimony. Phys. Rev. X, 12 (3). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2160-3308

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Abstract

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-Gr??neisen behavior of electrical resistivity is suddenly aborted below 15 K and replaced by a quadratic temperature dependence. At the 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 bifluid where frequent momentum-conserving collisions between electrons and phonons dominate the transport properties.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jaoui, Alexandre UNSPECIFIED orcid.org/0000-0002-2894-2054 UNSPECIFIED Gourgout, Adrien UNSPECIFIED UNSPECIFIED UNSPECIFIED Seyfarth, Gabriel UNSPECIFIED UNSPECIFIED UNSPECIFIED Subedi, Alaska UNSPECIFIED orcid.org/0000-0001-7537-8196 UNSPECIFIED Lorenz, Thomas UNSPECIFIED orcid.org/0000-0003-4832-5157 UNSPECIFIED Fauque, Benoit UNSPECIFIED UNSPECIFIED UNSPECIFIED Behnia, Kamran UNSPECIFIED orcid.org/0000-0001-8997-5645 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-691827
DOI:	10.1103/PhysRevX.12.031023
Journal or Publication Title:	Phys. Rev. X
Volume:	12
Number:	3
Date:	2022
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2160-3308
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THERMAL-CONDUCTIVITY; RESISTIVITY; BISMUTH; FLOW; HYDRODYNAMICS; MOBILITY Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/69182