Increase in the superconducting transition temperature of a thin film as a result of the deposition of a normal metal on its surface
Landau I. L., Shapovalov D. L., Parshin I. A.
The superconducting transition temperature of a thin bismuth film has been observed to rise as a result of the deposition of silver on the surface of the film. The effect stems from a suppression of the localization of conduction electrons due to a decrease in the surface resistivity of the film.