Reaching the unreachable: critical scaling at the superconducting transition

M.B. Salamon, W. Lee, K. Ghiron, J. Shi, N. Overend and M.A. Howson

Physica A: Statistical Mechanics and its Applications, 1993, vol. 200, issue 1, 365-373

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.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:200:y:1993:i:1:p:365-373

DOI: 10.1016/0378-4371(93)90536-D

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