Nonlinear current-voltage characteristics of three-dimensional Josephson-junction arrays with anisotropic interactions

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.13784· OSTI ID:5920829

Sugano, R; Onogi, T; Murayama, Y ^[1]

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1. Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-03 (Japan)

We perform Langevin dynamic simulations to calculate the current-voltage ([ital I]-[ital V]) characteristics for anisotropic three-dimensional arrays of resistively shunted Josephson junctions as a high-[ital T][sub [ital c]] oxide model. In zero and finite applied magentic fields, at various Josephson-coupling anisotropies ([gamma]=[ital J][sub [vert bar][vert bar][ital c]]/[ital J][sub [perpendicular][ital c]]), we see that the interlayer Josephson coupling gives rise to a nonvanishing critical current ([ital I][sub [ital c]]), and the low-temperature phase displays non-Ohmic power-law [ital I]-[ital V] characteristics [[ital V][proportional to][ital I]([ital I][minus][ital I][sub [ital c]])[sup [alpha][minus]1]]. Based on the [gamma] dependence of [ital I][sub [ital c]], we discuss the two- to three-dimensional crossover associated with thermal excitations of vortex-antivortex pairs.

• OSTI ID: 5920829
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:18; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COMPUTERIZED SIMULATION
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
EQUATIONS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
LANGEVIN EQUATION
NONLINEAR PROBLEMS
SIMULATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
VORTICES