SUPERCONDUCTING CURRENT IN NARROW PROXIMITY WIRES

The critical supercurrent in proximity-wires shows a surprising depend ence in the experiment [1]. This observation has lead to speculation w hether there are new effects involved and/or the usual criterion for t he dirty limit is not valid for this type of systems. We propose a sim ple SNS-model for this system and show analytically, that this unexpec ted scaling is already contained in a conventional description of this model by quasiclassical Green's functions in the dirty limit. Based o n further numerical calculations, excellent agreement with the experim ental results is obtained.