Theory of Josephson effect in Sr2RuO4/diffusive normal metal/Sr2RuO4 junctions


Sawa, Y. and Yokoyama, T. and Tanaka, Y. and Golubov, A.A. (2007) Theory of Josephson effect in Sr2RuO4/diffusive normal metal/Sr2RuO4 junctions. Physica C: Superconductivity, 463-465 . pp. 997-1000. ISSN 0921-4534

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Abstract:We derive a generalized Nazarov’s boundary condition for diffusive normal metal (DN)/chiral p-wave superconductor (CP) interface including the macroscopic phase of the superconductor. The Josephson effect is studied in CP/DN/CP junctions solving the Usadel equations under the above boundary condition. We find that, enhancement of a critical current at low temperature is small compared with that in px-wave /DN/px-wave junctions. As a result, temperature dependence of the critical current in these junctions is similar to that in conventional junctions. The result is consistent with the experiment in Sr2RuO4–Sr3RuO7 eutectic junctions. Similar feature is also found in current–phase relation.
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Copyright:© 2007 Elsevier
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