Analysis of the proximity-induced Josephson effect in superconducting-normal contacts

Journal Article · Wed Feb 28 23:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.4072· OSTI ID:6963213

Kadin, A M ^[1]

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1. Department of Electrical Engineering, University of Rochester, Rochester, New York 14627 (USA)

Several investigators have observed microwave-induced steps and other Josephson-like features in the {ital I}-{ital V} characteristics of point contacts between a conventional superconductor ({ital S}) and a normal metal ({ital N}). Recently, S. Han {ital et} {ital al}. have interpreted these results in terms of a model of a proximity-induced Josephson effect (PIJE) in an {ital SN} contact and have used this model to infer the existence of {ital p}-wave pairing in superconducting UBe{sub 13}. We show that their model is incorrect on fundamental grounds, and that their PIJE analysis is in direct conflict with long-standing theoretical and experimental studies of the pair-field susceptibility in {ital SN} tunnel junctions. In addition, we outline a possible alternative explanation for the experimental observations of Han {ital et} {ital al}. based on a model of a phase-slip center near the tip of the {ital S} point in an {ital SN} contact.

• OSTI ID: 6963213
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:7; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ALLOYS
ALLOYS
BERYLLIUM ALLOYS
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
EQUIPMENT
GINZBURG-LANDAU THEORY
INTERACTIONS
JOSEPHSON EFFECT
JUNCTIONS
P WAVES
PAIRING INTERACTIONS
PARTIAL WAVES
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
URANIUM ALLOYS