Fermi- to non-Fermi-liquid crossover and Kondo behavior in two-dimensional (Cu2/3V1/3)V2S4

被引：4

作者：

Gauzzi, A. ^{[1
]}

Moutaabbid, H. ^{[1
]}

Klein, Y. ^{[1
]}

Loupias, G. ^{[1
]}

Hardy, V ^{[2
]}

机构：

[1] Sorbonne Univ, IMPMC, UMR7590, CNRS,Museum Natl Hist Nat, 4 Pl Jussieu, F-75005 Paris, France

[2] CNRS, ENSICAEN, UNICAEN, Lab CRISMAT UMR 6508, Caen, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2019年 / 31卷 / 31期

关键词：

Fermi liquids; Kondo effect; specific heat; transport properties; layered transition metal dichalcogenides; ELECTRON-ELECTRON SCATTERING; HEAVY-FERMION; MAGNETIC-PROPERTIES; RESISTIVITY; TRANSITION; SUPERCONDUCTIVITY; DEPENDENCE; ALLOYS; STATE; CU;

D O I：

10.1088/1361-648X/ab1d9b

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By means of a specific heat (C) and electrical resistivity (rho) study, we give evidence of a pronounced Fermi liquid (FL) behavior with sizable mass renormalization, m*/m = 30, up to unusually high temperatures similar to 70 K in the layered system (Cu2/3V1/3)V2S4. At low temperature, a marked upturn of both C and o is suppressed by magnetic field, which suggests a picture of Kondo coupling between conduction electrons in the VS2 layers and impurity spins of the V3+ ions located between layers. This picture opens the possibility of controlling electronic correlations and the FL to non-FL crossover in simple layered materials. For instance, we envisage that the coupling between layers provided by the impurity spins may realize a two-channel Kondo state.

引用

页数：6

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