Thermoelectric Power at Low Temperatures in Ce(Ni1-xPdx)2Ge2 and CeCu5.9Au0.1 in the Vicinity of Antiferromagnetic Quantum Critical Point

被引：3

作者：

Kuwai, Tomohiko ^{[1
]}

Iwaki, Toru ^{[1
]}

Takeuchi, Michio ^{[1
]}

Mizushima, Toshio ^{[1
]}

Tayama, Takashi ^{[1
]}

Isikawa, Yosikazu ^{[1
]}

Fukuhara, Tadashi ^{[2
]}

机构：

[1] Toyama Univ, Dept Phys, Toyama 9308555, Japan

[2] Toyama Prefectural Univ, Dept Liberal Arts & Sci, Imizu, Toyama 9390398, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷

关键词：

quantum critical point; non Fermi liquid; thermoelectric power; specific heat; FERMI-LIQUID BEHAVIOR; ELECTRON; HEAT;

D O I：

10.1143/JPSJS.80SA.SA064

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present experimental results of thermoelectric power S and magnetic specific heat C-m down to 0.2 K for Ce(Ni1-xPdx)(2)Ge-2 (x = 0 similar to 0.12) and CeCu5.9Au0.1, being located in the vicinity of antiferro-magnetic quantum critical point (AFM-QCP). S/T for Ce(Ni1-xPdx)(2)Ge-2 shows complicated temperature dependence in contrast to a monotonic increase in the C-m/T with decreasing temperatures. The correlation parameter q, equivalent to the ratio S/C-m, decreases below 10 K attaining a considerably smaller value than unity at the lowest temperature for CeNi2Ge2. On the other hand, the q for CeCu5.9Au0.1 deviates upward below 0.6 K from the saturation around 1 K, and reaches unity at the lowest temperature. The contrastive observation in the q between the both systems at low temperatures seems to reflect the difference in the AFM-QCP type.

引用

页数：3

共 20 条

[1] On the thermoelectricity of correlated electrons in the zero-temperature limit [J].