YbRh2Si2:: Pronounced non-Fermi-liquid effects above a low-lying magnetic phase transition

被引：488

作者：

Trovarelli, O ^{[1
]}

Geibel, C ^{[1
]}

Mederle, S ^{[1
]}

Langhammer, C ^{[1
]}

Grosche, FM ^{[1
]}

Gegenwart, P ^{[1
]}

Lang, M ^{[1
]}

Sparn, G ^{[1
]}

Steglich, F ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.85.626

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of non-Fermi-liquid (NFL) effects in a clean Yb compound at ambient pressure and zero magnetic field. The electrical resistivity and the specific-heat coefficient of high-quality single crystals of YbRh2Si2 present a linear and a logarithmic temperature dependence, respectively, in more than a decade in temperature. We ascribe this NFL behavior to the presence of (presumably) quasi-2D antiferromagnetic spin fluctuations related to a very weak magnetic phase transition at T-N similar or equal to 65 mK. Application of hydrostatic pressure induces anomalies in the electrical resistivity, indicating the stabilization of magnetic order.

引用

页码：626 / 629

页数：4

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