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

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Yokoyama, T. and Tanaka, Y. and Golubov, A.A. and Asano, Y. (2006) Nonmonotonic temperature dependence of critical current in diffusive d-wave junctions. Physical Review B: Condensed matter and materials physics, 73 (14). 140504(R). ISSN 1098-0121

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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.
Item Type:Article
Copyright:© 2006 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/59093
Official URL:http://dx.doi.org/10.1103/PhysRevB.73.140504
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