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 behavior 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.
|Titolo:||General interpolation scheme for thermal fluctuations in superconductors|
|Data di pubblicazione:||2006|
|Citazione:||General interpolation scheme for thermal fluctuations in superconductors / MAROTTA L; CAMARDA M; ANGILELLA G.G.N; SIRINGO F.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 73:10(2006), pp. 104517-1-104517-7.|
|Appare nelle tipologie:||1.1 Articolo in rivista|