1. A general interpolation scheme for thermal fluctuations in superconductors
- Author
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Marotta, L., Camarda, M., Angilella, G. G. N., and Siringo, F.
- Subjects
Condensed Matter - Superconductivity - Abstract
We present a general interpolation theory for the phenomenological effects of thermal fluctuations in superconductors. Fluctuations are described by a simple gauge invariant extension of the gaussian effective potential for the Ginzburg-Landau static model. The approach is shown to be a genuine variational method, and to be stationary for infinitesimal gauge variations around the Landau gauge. Correlation and penetration lengths are shown to depart from the mean field behaviour in a more or less wide range of temperature below the critical regime, depending on the class of material considered. The method is quite general and yields a very good interpolation of the experimental data for very different materials., Comment: some misprints have been corrected in Eq.(15),(19); more references and comments have been added
- Published
- 2005
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