Observation of a Phase-Modulated Quasiparticle Current in Superconducting Weak Links

Abstract
Current-voltage characteristics of current-biased Josephson junctions with a phase-dependent dissipative current σ1Vcosϕ have been calculated in the presence of thermal noise. Measurements on superconducting weak links indicate the existence of such a phase-dependent dissipative current of the same magnitude and sign observed in tunnel junctions.