Bi_(2-x)Pb_xSr_2CaCu_2O_(8+δ)的温差电势率理论分析  

A Theoretical Research of Thermoelectric Power of Bi 2- x Pb x Sr 2CaCu 2O 8+ δ

作　　者：杨晓强[1] 章立源[1] 

机构地区：[1]北京大学物理系

出　　处：《北京大学学报（自然科学版）》1997年第1期49-52,共4页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金

摘　　要：以局域对温差电势率的理论分析Ｂｉ２－ｘＰｂｘＳｒ２ＣａＣｕ２Ｏ８＋δ正常态的温差电势率。结果表明此理论与实验一致。指出高温超导系统作为双成分系统（近局域化的负Ｕ中心子系统和巡游载流子子系统），随温度下降出现了退局域化过程。A theoretical research of thermoelectric power of Bi 2- x Pb x Sr 2CaCu 2O 8+ δ is done with the local pair thermoelectric power theory,and the results are consistent with the experiment.It is argued that the high T C superconductor,which is considered as a two component system (nearly local negative U center subsystem and itinerant carriers subsystem),goes through a delocalized process when temperature decreases.Below a certain temperature,it tends to become superconducting.

关 键 词：温差电势率 高TC 超导体 BPSCCO 铋系 

分 类 号：O511.2[理学—低温物理]