掺Ce的Bi-2212超导体的热导  

THERMAL CONDUCTIVITY OF Ce DOPPED Bi-2212

作　　者：李波[1] 吴柏枚[1] 杨东升[1] 郑卫华[1] 金华[1] 高惠平[1] 

机构地区：[1]结构研究开放实验室

出　　处：《低温物理学报》2003年第A01期253-257,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金 (No .10 1740 70 );国家重点基础研究专项经费 (NKBRSF G19990 646)资助项目~~

摘　　要：报道了掺Ce的Bi 2 2 1 2系列样品Bi2 Sr2 Ca1 -xCexCu2 Oy,x=0 .1 ,0 .2 ,0 .3 ,在 50到 2 0 0K温区的热导率 .观察到随着Ce掺杂的增加Tc 以下的热导峰位基本上不变 ,但峰高被明显压低 .我们用正常态电子散射模型对热导峰进行了拟合 ,结果显示Ce掺杂对Tc 附近超导涨落的压制作用 .The thermal conductivity of Bi-2Sr-2Ca-{1-x}Ce-xCu-2O-y,x0.1,0.2,0.3, has been measured in the temperature range from 50 to 200K. It is observed that the thermal conductivity peak below T-c hardly moves as Ce doping increasing, but the height of the peak is suppressed. We simulated the wide peak by means of the normal electronic relax-time model. The results show that the superconducting fluctuation near T-c is suppressed as Ce doping increased.

关 键 词：高温超导 铈掺杂 铋2212超导体 热导率测量 临界温度 超导涨落 电子散射模型 电输运性质 纵向稳态热流法 

分 类 号：O511.4[理学—低温物理]