A general interpolation scheme for thermal fluctuations in superconductors
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.
Keywords
Cite
@article{arxiv.cond-mat/0507577,
title = {A general interpolation scheme for thermal fluctuations in superconductors},
author = {L. Marotta and M. Camarda and G. G. N. Angilella and F. Siringo},
journal= {arXiv preprint arXiv:cond-mat/0507577},
year = {2007}
}
Comments
some misprints have been corrected in Eq.(15),(19); more references and comments have been added