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Type: Artigo de periódico
Title: Low-frequency spin dynamics in the CeMIn5 materials
Author: Curro, NJ
Sarrao, JL
Thompson, JD
Pagliuso, PG
Kos, S
Abanov, A
Pines, D
Abstract: 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.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.90.227202
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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