Reaching the unreachable: critical scaling at the superconducting transition
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.
Year of publication: |
1993
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Authors: | Salamon, M.B. ; Lee, W. ; Ghiron, K. ; Shi, J. ; Overend, N. ; Howson, M.A. |
Published in: |
Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 200.1993, 1, p. 365-373
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Publisher: |
Elsevier |
Saved in:
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