Evidence of a Kondo lattice quantum critical point and of non-Fermi liquid behavior in the intercalated layered system V₅S₈

2024/08/19 by Hancheng Yang, Hicham Moutaabbid, Yang, Hancheng +9
Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Condensed Matter Physics #FOS: Physical sciences #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2408.09956

openalex publication_date 2024/08/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

By means of a specific heat, susceptibility and high-pressure electrical resistivity study, we show that the local magnetic moments of the intercalated V ions in V₅S₈ realize a prototype of Kondo lattice system, where an antiferromagnetic order of the moments coexists with a Fermi liquid in the VS₂ layers with intermediate heavy Fermion properties. The antiferromagnetic order and the Fermi-liquid behavior are simultaneously suppressed at a critical pressure, P_c =10 GPa, signature of a quantum critical point, which supports a Kondo lattice scenario and raises the question whether, in the paramagnetic phase at higher pressures, the heavy quasiparticles survive or form a non-Fermi liquid phase governed by the Kondo interaction.

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