中国物理B ›› 1995, Vol. 4 ›› Issue (7): 536-541.doi: 10.1088/1004-423X/4/7/008

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THERMOELECTRIC POWER OF A LOCAL PAIR MODEL AND ITS APPLICABILITY TO YBa2Cu3O7

章立源, 葛久元   

  1. Department of Physics, Peking University, Beijing 100871, China
  • 收稿日期:1994-09-02 出版日期:1995-07-20 发布日期:1995-07-20
  • 基金资助:
    Project supported by the Doctoral Program Foundation of institution of Higher Education of China and by the Computer Center of Peking University.

THERMOELECTRIC POWER OF A LOCAL PAIR MODEL AND ITS APPLICABILITY TO YBa2Cu3O7

ZHANG LI-YUAN (章立源), GE JIU-YUAN (葛久元)   

  1. Department of Physics, Peking University, Beijing 100871, China
  • Received:1994-09-02 Online:1995-07-20 Published:1995-07-20
  • Supported by:
    Project supported by the Doctoral Program Foundation of institution of Higher Education of China and by the Computer Center of Peking University.

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摘要： A formula of thermoelectric power (TEP) for the local pair model has been derived. It has been found that from Tc to about 125K the TEP data of YBa2Cu3O7 (Y-123) can be described by this formula. We have also found that the formula of the diffusion thermoelec-tricity in the free electron approximation can be used to express the TEP data of Y-123 in the region of 220 to about 300 K. It seems that a general transition occurs in the intermediate temperature region, that is from the regime in which the local pair subsystem is dominating to the regime in which the itinerant carrier subsystem is dominating.

Abstract: A formula of thermoelectric power (TEP) for the local pair model has been derived. It has been found that from Tc to about 125K the TEP data of YBa2Cu3O7 (Y-123) can be described by this formula. We have also found that the formula of the diffusion thermoelec-tricity in the free electron approximation can be used to express the TEP data of Y-123 in the region of 220 to about 300 K. It seems that a general transition occurs in the intermediate temperature region, that is from the regime in which the local pair subsystem is dominating to the regime in which the itinerant carrier subsystem is dominating.

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  • 74.25.Fy