Non-Fermi-liquid effects in stoichiometric 4f-electron metals at ambient pressure

被引：14

作者：

Steglich, F ^{[1
]}

Gegenwart, P ^{[1
]}

Geibel, C ^{[1
]}

Hinze, P ^{[1
]}

Lang, M ^{[1
]}

Langhammer, C ^{[1
]}

Sparn, G ^{[1
]}

Trovarelli, O ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

PHYSICA B-CONDENSED MATTER | 2000年 / 280卷 / 1-4期

关键词：

heavy fermion; non-Fermi-liquid effects; stoichiometric compounds;

D O I：

10.1016/S0921-4526(99)01736-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We discuss strong deviations from the signatures of a heavy Landau-Fermi liquid already at p = 0 that are observed for normal (n)-state CeCu2Si2, for CeNi2Ge2 and YbRh2Si2. No quantum critical point could yet be established in the case of CeNi2Ge2. For this compound, preliminary investigations of the chemical phase diagram have revealed certain similarities to CeCu2Si2. The non-Fermi-liquid (NFL) effects observed for YbRh2Si2 suggest a quasi-2D system of magnetic fluctuations. We also discuss briefly disparities between resistivity and specific-heat results in all three compounds as well as the relationship between a NFL n-state and the occurrence of heavy-fermion superconductivity. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：349 / 353

页数：5

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