Conductance Anomalies for Normal-Metal-Insulator-Superconductor Contacts

Abstract

This paper considers the conductance through a dirty junction between a normal conductor and a superconductor with an insulating barrier. It is shown that for large barrier resistances there is a relative enhancement of the conductance near zero voltage, whereas for low barrier resistance this anomaly appears at finite voltage.

arXiv comment7 pages, latex, 7 figures, uufiles

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