Acta Scientiarum Naturalium Universitatis Pekinensis

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A Theoretical Research of Thermoelectric Power of Bi2-xPbxSr2CaCu2O8+δ

YANG Xiaoqiang, ZHANG Liyuan   

  1. Department of Physics, Peking University, Beijing, 100871
  • Received:1996-03-22 Online:1997-01-20 Published:1997-01-20

Bi2-xPbxSr2CaCu2O8+δ 的温差电势率理论分析

杨晓强, 章立源   

  1. 北京大学物理系,北京,100871

Abstract: A theoretical research of thermoelectric power of Bi2-xPbxSr2CaCu2O8+δ is done with the local pair thermoelectric power theory, and the results are consistent with the experiment. It is argued that the high-TC 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.

Key words: thermoelectric power(TEP), negative U center model, normal state property of high-TC superconductive oxides, local pair model of thermoletric power

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,形成产生超导的较佳条件。

关键词: 温差电势率, U中心理论, 高温超导氧化物正常态性质, 局域对温差电势率理论

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