Microscopic theory of the dc Josephson effect in clean superconductor/insulator and superconductor/semiconductor multilayers

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.7858· OSTI ID:632586

Kuplevakhsky, S V ^[1]; Naydenov, S V ^[2]; Galiautdinov, A A ^[3]

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1. Department of Physics, Kharkov State University, 310077 Kharkov (Ukraine)
2. Institute for Single Crystals, 310164 Kharkov (Ukraine)
3. Institute of Electrical Engineering, SAS, 842 39 Bratislava (Slovak Republic)

We have constructed a fully microscopic self-consistent theory of the dc Josephson effect in clean periodic superconducting multilayers with realistic finite-size repulsive barriers, at arbitrary temperatures. We have derived an explicit analytical expression for the critical Josephson current j{sub c} as a function of the superconductor-layer thickness a. In the limit a{lt}{xi}{sub 0}, we have found fundamental differences with the Ambegaokar-Baratoff relation: a strong reduction of j{sub c} and an unusual temperature dependence. In this limit, we also predict an exponential decrease of the critical temperature and the gap parameter due to the depairing effect of the Josephson current. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 632586
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRITICAL CURRENT
ENERGY GAP
JOSEPHSON EFFECT
LAYERS
MATHEMATICAL MODELS
SUPERCONDUCTING JUNCTIONS