重费米子系统CeAl_3和CeCu_2Si_2的温差电势率和比热的研究  

INVESTIGATION OF THE THERMOELECTRIC POWER AND SPECIFIC HEAT OF THE HEAVY FERMION SYSTEMS CeAl_3 AND CeCu_2Si_2

作　　者：罗强[1] 陈长风[1] 章立源[1] 

机构地区：[1]北京大学物理系

出　　处：《低温物理学报》1989年第3期174-178,共5页Low Temperature Physical Letters

摘　　要：本文从理论上研究了重费米子系统 CeAl_3和 CeCu_2Si_2的温差电势率和比热。结果表明在 T<T_K(T_K 为 Kondo 温度)时,相干性导致的电子态密度赝能隙对温差电势率和比热起决定性的作用;而 T>TK 时,系统可用单杂质的 Kondo 理论描述.We have investigated the thermoelectric power and specific heat of the heavy-fermion seys-tems,CeAl3 and CeCu2Si2,theoretically.The results show that when T<Tk (where Tk is the Kondo temperature),the coherence-derived pseudo-gap is very important for determing the-thermoeletric power and the specific heat: while T>Tk,the system can be described as the Kon-do impurity system.

关 键 词：重费米子系统 PET 比热 超导体 

分 类 号：TM263.014[一般工业技术—材料科学与工程]