I - V characteristics of a model vortex glass: A numerical study

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.9780· OSTI ID:6029906

Lee, K H; Stroud, D ^[1]

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1. Department of Physics, The Ohio State University, Columbus, Ohio (USA)

We study a hypothetical vortex-glass transition in disordered superconductors in a strong magnetic field, using a three-dimensional generalized Huse-Seung model of coupled, resistively shunted Josephson junctions. Assuming {ital T}{sub {ital g}}=0.45{ital E}{sub {ital J}}/{ital k}{sub {ital B}}, where {ital E}{sub {ital J}} is the coupling energy, the {ital I}-{ital V} characteristics are found to obey the dynamic scaling relation as proposed by Fisher {ital et} {ital al}., with critical exponents {ital z}{approx}4 and {nu}{approx}0.5 in the range of currents considered, in agreement with mean-field expectations. {nu} is somewhat smaller than found in recent high-field {ital I}-{ital V} measurements in superconducting thin films. We conclude that there is probably a vortex-glass transition in this model, with the predicted scaling characteristics, but that our calculations have not yet reached the small-current regime where the asymptotic critical exponents, rather than mean-field values, are expected.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 6029906
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:17; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GLASS
MIXED STATE
NUMERICAL SOLUTION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCALING LAWS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
VORTICES