An anomalous superconducting proximity effect between a strongly correlated electron system and a normal metal is demonstrated. The model system is a 2D ultrathin superconducting quench-condensed Pb film. Such a highly disordered film has a reduced transition temperature [Formula presented] due to the strong [Formula presented] interaction. Instead of weakening the superconductivity, an overlayer of Ag on Pb induces an increase of both the [Formula presented] and the gap. The restoration of the electron screening brought about by the quasiparticles from the normal metal can explain this striking inverse proximity effect.
|Number of pages||1|
|Journal||Physical Review Letters|
|State||Published - 2002|