Resistance of superconductor-normal-metal-superconductor (SNS) junctions
It is shown that the conductance of a superconductor-normal-metal-superconductor (SNS) junction can exhibit a significant dependence on the phase of the superconducting order parameter in the situation where the size of the normal region of the junction is much larger than the normal-metal coherence length, so that the critical current of the junction is exponentially small. The period of the conductance oscillations as a function of the phase can be equal to π or 2π, depending on the parameters of the system.