Increase of spatial fluctuations in superconductors near the Anderson transition
Bulaevskii L. N., Sadovskii M. V.
The superconducting order parameter has been found to exhibit strong, impurity-induced spatial fluctuations over a certain temperature interval near Tc. Far from the Anderson localization threshold, this interval is very narrow in comparison with the interval of strong thermodynamic fluctuations, and the superconducting order parameter is a self-averaging quantity. Because of the disorder, the fluctuations near the localization threshold are appreciable over the entire region of manifestation of the superconductivity.