Low-frequency spin dynamics in the CeMIn5 materials -: art. no. 227202

被引：47

作者：

Curro, NJ

Sarrao, JL

Thompson, JD

Pagliuso, PG

Kos, S

Abanov, A

Pines, D

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.90.227202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the spin lattice relaxation of the planar In(1) nuclei in the CeMIn5 materials, extract quantitative information about the low energy spin dynamics of the lattice of Ce moments in both CeRhIn5 and CeCoIn5, and identify a crossover in the normal state. Above a temperature T-* the Ce lattice exhibits "Kondo gas" behavior characterized by local fluctuations of independently screened moments; below T-* both systems exhibit a "Kondo liquid" regime in which interactions between the local moments contribute to the spin dynamics. Both the antiferromagnetic and superconducting ground states in these systems emerge from the Kondo liquid regime. Our analysis provides strong evidence for quantum criticality in CeCoIn5.

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页码：4 / 227202

页数：4

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