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High Pressure Study of High Temperature Superconductors: Material Base, Universal Tc-Behavior, and Charge Transfer

  • C. W. Chu
  • P. H. Hor
  • J. G. Lin
  • Q. Xiong
  • Z. J. Huang
  • R. L. Meng
  • Y. Y. Xue
  • Y. C. Jean
Chapter
Part of the NATO ASI Series book series (NSSB, volume 286)

Abstract

The superconducting transition temperature (Tc) has been measured in YBa2Cu3O6.7, YBa2Cu3O7, Y2Ba4Cu7O15, YBa2Cu4O8, Tl2Ba2Can−1CunOn+4−δ, La2−xSrxCuO4, and La2−xBaxCuO4 under high pressures. The pressure effect on the positron lifetime (τ) has also been determined in the first four compounds. Based on these and other high pressure data, we suggest that (1) all known cuprate high temperature superconductors (HTS’s) may be no more that mere modifications of either 214-T, 214-T′, 123, or a combination of 214-T′ and 123, (2) a nonmonotonic Tc-behavior may govern the Tc-variation of all hole cuprate HTS’s, and (3) pressure can induce charge transfer leading to a Tc-change. The implications of these suggestions will also be discussed.

Keywords

Unit Formula Superconducting Transition Temperature Trapping Site Positron Lifetime High Pressure Study 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • C. W. Chu
    • 1
  • P. H. Hor
    • 1
  • J. G. Lin
    • 1
  • Q. Xiong
    • 1
  • Z. J. Huang
    • 1
  • R. L. Meng
    • 1
  • Y. Y. Xue
    • 1
  • Y. C. Jean
    • 2
  1. 1.Department of Physics and Texas Center for SuperconductivityUniversity of HoustonHoustonUSA
  2. 2.Department of ChemistryUniversity of MissouriKansas CityUSA

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