Journal of Superconductivity

, Volume 3, Issue 4, pp 395–403 | Cite as

Consequences of the formation of Cooper-pairs near oxygen-deficient sites

  • W. Y. Kwok
  • P. C. W. Fung
Articles

Abstract

In this investigation we consider the formation of Cooper pairs near the oxygen-deficient sites in Y-Ba-Cu-O ceramic superconductors which would give rise to an energy-dependent potential as seen by conduction charge carriers. It is shown that Cooper pairs could be formed under such conditions, resulting in a supercurrent. We use the Bogoliubov transformation technique to calculate the energy gap, the energy difference, and the transition temperature of the model superconductor using certain data obtained from previous experiments. Numerical analysis shows that the superconducting current can be explained by the presence of such oscillating Cooper pairs.

Key words

High-Tc superconductivity oxygen deiects electron-phonon interaction YBa2Cu3O7−δ 

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Copyright information

© Plenum Publishing Corporation 1990

Authors and Affiliations

  • W. Y. Kwok
    • 1
  • P. C. W. Fung
    • 1
  1. 1.Physics DepartmentUniversity of Hong KongHong Kong

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