Disorder-driven non-Fermi-liquid behavior in CeRhRuSi2

被引：27

作者：

Liu, CY ^{[1
]}

MacLaughlin, DE

Castro Neto, AH

Lukefahr, HG

Thompson, JD

Sarrao, JL

Fisk, Z

机构：

[1] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[2] Whittier Coll, Whittier, CA 90608 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.61.432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report measurements of the bulk magnetic susceptibility and Si-29 nuclear magnetic resonance (NMR) linewidth in the heavy-fermion alloy CeRhRuSi2. The linewidth increases rapidly with decreasing temperature and reaches large values at low temperatures, which strongly suggests the wide distributions of local susceptibilities chi(j) obtained in disorder-driven theories of non-Fermi-liquid (NFL) behavior. The NMR linewidths agree well with distribution functions P(chi) which fit bulk susceptibility and specific-heat data. The apparent return to Fermi-liquid behavior observed below 1 K is manifested in the vanishing of P(chi) as chi-->infinity indicating the absence of strong magnetic response at low energies. Our results point out the need for an extension of some current theories of disorder-driven NFL behavior in order to incorporate this low-temperature crossover.

引用

页码：432 / 440

页数：9

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