Abstract
To clarify the origin of anomalous behaviors in Pb/Sr 2 RuO 4 /Pb junctions in terms of the pairing symmetry, a theory of the d.c. Josephson current in s -wave superconductor/ p -wave superconductor/ s -wave superconductor junctions is developed. Calculated results on the temperature dependence of the critical Josephson current show nonmonotonic behavior when the thickness of the p -wave superconductor is comparable to the coherence length. The consistency between the present results with recent experimental measurements support the possibility of a unitary p -wave pairing state in Sr 2 RuO 4 .
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