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Reaching the unreachable: critical scaling at the superconducting transition

Author

Listed:
  • Salamon, M.B.
  • Lee, W.
  • Ghiron, K.
  • Shi, J.
  • Overend, N.
  • Howson, M.A.

Abstract

The large coherence length of conventional superconductors causes the critical region near Tc to be unobservably small, leading to the impression that mean-field theory can adequately explain properties near the transition. The high-temperature superconductors, however, have such strongly type-II character that the critical, or at least an intermediate critical, region is experimentally accessible. We demonstrate the applicability of XY-like critical scaling to magnetization, heat capacity and conductivity data and through the fitting parameters, make contact with a strong-coupling calculation of the critical temperature. Further, the scaled conductivity data show clear evidence for a thermodynamic transition along the freezing line Hm(T)∝(1 − T/Tc)43.

Suggested Citation

  • Salamon, M.B. & Lee, W. & Ghiron, K. & Shi, J. & Overend, N. & Howson, M.A., 1993. "Reaching the unreachable: critical scaling at the superconducting transition," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 200(1), pages 365-373.
    • Handle: RePEc:eee:phsmap:v:200:y:1993:i:1:p:365-373
    DOI: 10.1016/0378-4371(93)90536-D
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