Anomalous charge transport in CeB6

被引：3
作者：
Ignatov, M. I.
Bogach, A. V.
Demishev, S. V.
Glushkov, V. V.
Levchenko, A. V.
Paderno, Yu. B.
Shitsevalova, N. Yu.
Sluchanko, N. E.
机构：
[1] RAS, AM Prokhorov Gen Phys Inst, Moscow 119991, Russia
[2] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia
[3] Inst Mat Sci Problems, UA-252680 Kiev, Ukraine
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 09期
基金：
俄罗斯基础研究基金会;
关键词：
Kondo lattice; charge transport;
D O I：
10.1016/j.jssc.2006.01.016
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The comprehensive study of conductivity (7, Hall coefficient RH and Seebeck coefficient S has been carried out on high-quality single crystals of CeB6 in a wide range of temperatures 1.8-300 K. An anomalous behavior of all transport characteristics (sigma, R-H, S) was found for the first time in the vicinity of T* approximate to 80 K. The strong decrease of conductivity a as well as the unusual asymptotic behavior of Seebeck coefficient S(T)similar to-In T observed below T* allowed us to conclude in favor of crossover between different regimes of charge transport in CeB6. The pronounced change of Hall mobility mu(H), which diminishes from the maximum value of 20 cm(2)/(Vs) at T* to the values of similar to 6 cm(2)/(Vs) at T similar to 10 K, seems to be attributed to the strong enhancement of charge carriers scattering due to fast spin fluctuations on Ce-sites. The low-temperature anomalies of the charge transport characteristics are compared with the predictions of the Kondo-lattice model. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码：2805 / 2808
页数：4
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