Electron-electron and electron-phonon collision cross sections in CsV 3 Sb 5
Abstract
AV3Sb5 (A = K, Rb, Cs) are kagome metals and superconductors, attracting much recent attention as nexus of multiple quantum states. Here, through a systematic study of electric and thermal transport of CsV3Sb5, we identify it as a metallic Fermi liquid with moderate electronic correlations and strong electron-phonon (e-ph) collision cross section. We observe contributions to the inelastic electrical resistivity, each dominating within a distinct temperature window. The prefactor of the T 2 is consistent with the Kadowaki-Woods scaling for a Fermi liquid with moderate correlation. By performing thermal conductivity measurements at zero and finite magnetic field, we separate the electronic and the lattice contributions to the thermal conductivity. The Wiedemann-Franz law is satisfied in the zero-temperature limit, while a downward deviation emerges at finite temperature due to the mismatch between the prefactors of the electrical and thermal quadratic resistivities, as reported in other metals. The Bloch-Grüneisen description of electron-phonon scattering successfully accounts for both electronic thermal and electrical transport, indicating a remarkably large e-ph collision cross section in CsV3Sb5.
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BibTeX
@article{menil2026electronelectron,
title = {{Electron-electron and electron-phonon collision cross sections in CsV 3 Sb 5}},
author = {Charles Menil and Andrea Capa Salinas and Stephen Wilson and Benoît Fauqué and Kamran Behnia},
journal = {Physical Review B},
year = {2026},
month = jul,
doi = {10.1103/z8h8-lp5b},
url = {https://hal.science/hal-05798551v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Electron-electron and electron-phonon collision cross sections in CsV 3 Sb 5
AU - Charles Menil
AU - Andrea Capa Salinas
AU - Stephen Wilson
AU - Benoît Fauqué
AU - Kamran Behnia
PY - 2026
DA - 2026/07/28
JO - Physical Review B
DO - 10.1103/z8h8-lp5b
UR - https://hal.science/hal-05798551v1
AB - AV3Sb5 (A = K, Rb, Cs) are kagome metals and superconductors, attracting much recent attention as nexus of multiple quantum states. Here, through a systematic study of electric and thermal transport of CsV3Sb5, we identify it as a metallic Fermi liquid with moderate electronic correlations and strong electron-phonon (e-ph) collision cross section. We observe contributions to the inelastic electrical resistivity, each dominating within a distinct temperature window. The prefactor of the T 2 is consistent with the Kadowaki-Woods scaling for a Fermi liquid with moderate correlation. By performing thermal conductivity measurements at zero and finite magnetic field, we separate the electronic and the lattice contributions to the thermal conductivity. The Wiedemann-Franz law is satisfied in the zero-temperature limit, while a downward deviation emerges at finite temperature due to the mismatch between the prefactors of the electrical and thermal quadratic resistivities, as reported in other metals. The Bloch-Grüneisen description of electron-phonon scattering successfully accounts for both electronic thermal and electrical transport, indicating a remarkably large e-ph collision cross section in CsV3Sb5.
SN - 2469-9950
SN - 2469-9969
ER -