Josephson-oscillator spectrum and the reentrant phase transition in granular superconductors

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.7074· OSTI ID:5176854

Simkin, M V ^[1]

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1. Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Head Post Office, P.O. Box 79, Moscow (U.S.S.R.)

The superconductive phase transition in a granular superconductor, modeled as a Josephson-junction array, is studied using a self-consistent mean-field theory. In the case when the Josephson oscillator was treated as a pendulum with discrete energy levels, no reentrant behavior was found. In the opposite extreme when it was treated as a quantum particle in a periodic field, having a band-energy spectrum, there exists a reentrance from the superconductive to the normal state as the temperature is further lowered.

• OSTI ID: 5176854
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:13; 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
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GRANULAR MATERIALS
JOSEPHSON JUNCTIONS
JUNCTIONS
MATERIALS
MATHEMATICAL MODELS
MEAN-FIELD THEORY
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUANTIZATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY