Thermal expansion of the non-Fermi liquid system Th1-xUxRu2Si2 (x<=0.07)

被引：13

作者：

Amitsuka, H ^{[1
]}

Sakakibara, T ^{[1
]}

deVisser, A ^{[1
]}

Kayzel, FE ^{[1
]}

Franse, JJM ^{[1
]}

机构：

[1] UNIV AMSTERDAM,VAN DER WAALS ZEEMAN INST,NL-1018 XE AMSTERDAM,NETHERLANDS

来源：

PHYSICA B | 1997年 / 230卷

关键词：

non-Fermi liquid system; Th1-xUxRu2Si2; thermal expansion; Kondo effect;

D O I：

10.1016/S0921-4526(96)00762-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied non-Fermi liquid properties of the tetragonal diluted uranium alloys Th1-xUxRu2Si2 (x less than or equal to 0.07), by means of thermal expansion measurements in the temperature range 0.5-100 K. As the temperature is lowered below about 10 K, the volume effect alpha(v)(T)/T ( = (alpha(c) + 2 alpha(a))/T) is found to exhibit the tendency to diverge logarithmically, similar to other quantities of the system: C/T similar to - ln T, chi similar to - ln T, rho similar to ln T (or T (1/2)). Interestingly, the sign of the anomaly in a(v)(T) is negative, opposite to the usual Kondo shrink behavior. As a possible interpretation, we discuss the two-channel Kondo model, proposing c-f hybridization effects dominated by the virtual f(2)-f(3) charge fluctuations.

引用

页码：613 / 615

页数：3

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