arXiv:cond-mat/0607303·v3·Superconductivity
Superconductors with two critical temperatures
E. Di Grezia · S. Esposito · G. Salesi
Abstract
We propose a simple model for superconductors endowed with two critical temperatures, corresponding to two second-order phase transitions, in the framework of the Ginzburg-Landau mean-field theory. For very large Cooper pair self-interaction, in addition to the standard condensation occurring in the Ginzburg-Landau theory, we find another phase transition at a lower temperature with a maximum difference of 15% between the two critical temperatures.
Comments: revtex, 3 pages, one eps figure