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

T. Yokoyama, Y. Tanaka, Alexandre Avraamovitch Golubov, Y. Asano

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Abstract

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.
Original languageUndefined
Pages (from-to)14050R-
JournalPhysical review B: Condensed matter and materials physics
Volume73
Issue number14
DOIs
Publication statusPublished - 2006

Keywords

  • METIS-233430
  • IR-59093

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