Theory of the d.c. Josephson effect in Pb / Sr2RuO4 / Pb
Masashi Yamashiro, Yukio Tanaka, Satoshi Kashiwaya
Abstract
To clarify the origin of anomalous behaviors in Pb/Sr2RuO4/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 exhibit non-monotonous behaviors when the thickness of the p-wave superconductor is comparable to the coherence length. The consistency between present results with recent experimental measurement supports the possibility of a unitary p-wave pairing state in Sr2RuO4.
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