INFLUENCE OF NON-MAGNETIC IMPURITIES ON JOSEPHSON'S CURRENT IN SNINS JUNCTIONS FOR TEMPERATURES CLOSE TO CRITICAL

Abstract

Equilibrium current states in superconducting junctions of SNINS-type (S – superconductor, N – normal metal, I – insulator) for arbitrary concentrations of nonmagnetic impurities in superconducting regions were investigated using the Ginzburg-Landau theory near the critical temperature. We found the current-phase relation valid in a wide range of electron transmission coefficient values and an arbitrary thickness of the normal layer. The influence of depairing effects was taken into account.