Theory of the proximity effect at the interface of a normal metal and triplet p-wave superconductor in the clean limit

Y. Tanuma; Y. Tanaka; S. Kashiwaya

doi:10.1103/PhysRevB.74.024506

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Theory of the proximity effect at the interface of a normal metal and triplet p-wave superconductor in the clean limit

Y. Tanuma, Y. Tanaka, S. Kashiwaya

DOI 10.1103/PhysRevB.74.024506 · Physical Review B

T1

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Abstract

The superconducting proximity effect in normal metal (N)/triplet p-wave superconductor (P) junctions is studied based on the quasiclassical Green’s function theory. We present theoretical results for self-consistently determined pair potentials on both the N and P sides as well as the quasiparticle local density of states near the interface. In the present study, for the P side, in order to consider promising pairing symmetries as in Sr2RuO4, we choose three kinds of pairings: (i) px, (ii) py, or (iii) px+ipy waves. Here, we assume that an attractive interelectron potential on the N side can induce a subdominant s-wave pair potential. The spatial dependencies are sensitive to the transparency of the junctions, while the proximity-induced s-wave component on the N side does not enhance the magnitude of the pair potential, which breaks the time-reversal symmetry on the P side. The resulting local density of states at the interface has a zero-energy peak, and its splitting depends on the transparency and symmetry of the pair potentials of the junction.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown