Nonmonotonic temperature dependence of critical current in diffusive d-wave junctions

Details Nonmonotonic temperature dependence of critical current in diffusive d-wave junctions Nonmonotonic temperature dependence of critical current in diffusive d-wave junctions

2006-05-15

arxiv.org/abs/cond-mat/0605373v1

Phys. Rev. B 73, 140504(R) (2006)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.73.140504

We study the Josephson effect in D/I/DN/I/D junctions, where I, DN and D denote an insulator, a diffusive normal metal and a d-wave superconductor, respectively.The Josephson current is calculated based on the quasiclassical Green's function theory with a general boundary condition for unconventional superconducting junctions. In contrast to s-wave junctions, the product of the Josephson current and the normal state resistance is enhanced by making the interface barriers stronger. The Josephson current has a nonmonotonic temperature dependence due to the competition between the proximity effect and the midgap Andreev resonant states.

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