2026/02/28 by Anonymous, Charles Menil, Andrea Capa Salinas +3
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/z8h8-lp5b
published as Phys. Rev. B 114, 065136 (2026)
openalex publication_date 2026/06/29 · openalex created_date 2026/06/30 · arxiv created 2026/07/30 · openalex updated_date 2026/07/30 · arxiv updated 2026/07/31
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 ans 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 T2 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.