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Logarithmic Rounding Above the Superconducting Transition in YBa2Cu3O7 Crystals

Published online by Cambridge University Press:  28 February 2011

A. T. Fiory ,
A. F. Hebard ,
L. F. Schneemeyer  and
J. V. Waszczak
A. T. Fiory
Affiliation:
AT&T Bell Laboratories, Murray Hill NJ 07974
A. F. Hebard
Affiliation:
AT&T Bell Laboratories, Murray Hill NJ 07974
L. F. Schneemeyer
Affiliation:
AT&T Bell Laboratories, Murray Hill NJ 07974
J. V. Waszczak
Affiliation:
AT&T Bell Laboratories, Murray Hill NJ 07974
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Abstract

The temperature dependence of the electrical conductivity measured in the a-b basal plane of YB2Cu3O7 crystals displays a weak, nearly logarithmic divergence near Tc, which is weaker than the power-law functions predicted by superconducting fluctuations in 1, 2, or 3 dimensions. On the other hand, we find that quasi-particle fluctuations and pair-breaking in two-dimensions as given by Maki and Thompson, where the pair-breaking parameter δ is assumed to be proportional to temperature, gives by itself an excellent fit to the data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 861
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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