Resistance of superconductor-normal metal-superconductor junctions

摘要

It is shown that the conductance of a superconductor-normalmetal-superconductor junction can exhibit a significant dependence on the phaseof the superconducting order parameter in the situation when the size of thenormal region of the junction is much larger than the normal metal coherencelength and the critical current of the junction is already exponentially small.The period of the conductance oscillations as a function of the phase can beequal to $\pi$ or $2\pi$ depending on parameters of the system.