Effect of resonance scattering on Josephson current through a superconductor-normal-metal-superconductor junction

Le résumé fourni par la source

The effect of resonance scattering due to finite but small concentration of localized nonmagnetic impurities on the zero-bias Josephson current through a superconductor-normal-metal-superconductor (SNS) junction is studied at $T=0$\ifmmode^\circ\else\textdegree\fi{}K. The ratio of the barrier supercurrent of the impure SNS junction to that of the pure one is found to decrease with an increase in the impurity concentration. This behavior is completely different from that of nonlocalized nonmagnetic impurities, where this ratio is exactly equal to one. At $\ensuremath{\zeta}=0$ ($\ensuremath{\zeta}$ is a measure of the impurity concentration) our result agrees exactly with that of Ishii for the pure case.

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