MICROSCOPIC THEORY OF THE CURRENT-VOLTAGE RELATIONSHIP ACROSS A NORMAL-SUPERCONDUCTING INTERFACE

Measurements by Pippard et al. have shown the existence of an extra resistance due to the penetration of an electrical potential into a superconductor. Previous theories of this effect are unable to explain the full temperature dependence of the extra resistance because they use oversimplified models of the normal superconducting interface. We show that the microscopic theory for dirty superconductors leads to a good agreement with experiment over the whole temperature range. © 1979 Plenum Publishing Corporation.