Abstract
Resistive properties of 3D systems formed by a normal metal and type I superconductor (Cu–Sn) with a large electron mean free path in the normal metal are investigated in the liquid-helium temperature region. A number of new types of temperature behavior of the normal metal conductivity is revealed at temperatures below the superconducting transition temperature of the superconductor in contact with the normal metal for distances commensurate with a typical mesoscopic scale of electron transport trajectories in the normal metal, in which the phase memory of wave functions is retained.
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