Anomalous Josephson vortex solutions in Josephson junctions with multiple tunneling channels |
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| Authors: | Y Ota M Machida T Koyama H Matsumoto |
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| Institution: | 1. CCSE, Japan Atomic Energy Agency, 6-9-3 Higashi-Ueno, Taito-ku, Tokyo 110-0015, Japan;2. Institute for Materials Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, Japan;3. CREST (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;4. JST-TRIP, 5 Sanbancho Chiyoda-ku, Tokyo 102-0075, Japan |
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| Abstract: | We construct a theory for Josephson junction with multiple tunneling channels. We focus on two situations, i.e., a heterotic junction composed of two-gap-superconductor, insulator, and one-gap-superconductor, and a grain-boundary junction formed by two identical multi-gap superconductors. Then, we show that the magnetic field distribution of the Josephson vortex for ±s-wave superconductivity is much more enlarged than that for s-wave without sign change between the order parameters. We display such anomalous vortices and suggest how to evaluate the enlargement. |
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| Keywords: | Josephson junctions Iron-based superconductors Josephson vortex |
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