Resistive transition of superconducting-wire networks. Influence of pinning and fluctuations

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00118330· OSTI ID:7009768

Giroud, M; Buisson, O; Wang, Y Y; Pannetier, B ^[1]; Mailly, D ^[2]

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1. Centre National de la Recherche Scientifique, Grenoble (France)
2. Centre National de la Recherche Scientifique, Bagneux (France)

The authors studied the resistive transition of several 2-D superconducting-wire networks of various coupling strengths, which they characterize in terms of the Kosterlitz-Thouless transition temperature and the ratio {xi}/a of the coherence length to the array period. In the extreme strong-coupling limit where the mesh size is of the order of the zero-temperature coherence length, the superconducting behavior is well described by the mean-field properties of the superconducting wave function. Extending to 2-D array, the 1-D phase-slippage model explains the dissipative regime observed above the Ginzburg-Landau depairing critical current. On the other hand, when the coupling is weak, phase fluctuations below the Ginzburg-Landau transition and vortex depinning dominate the resistive behavior. An activated dissipation is observed even below the depairing critical current. Results obtained in this regime for critical temperature, magnetoresistance, or critical current versus temperature, and magnetic field are shown; their periodic oscillations are discussed in terms of depinning of vortices on the array. A simple periodic pinning potential for a vortex in a wire network is calculated, and compared with the case of pinning in Josephson junction arrays. It is shown that this model explains qualitatively the experimental results observed for small {xi}/a.

• OSTI ID: 7009768
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 87:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
COHERENCE LENGTH
COUPLING
CRITICAL CURRENT
CURRENTS
DIMENSIONS
DISLOCATION PINNING
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELEMENTS
GINZBURG-LANDAU THEORY
LENGTH
MAGNETORESISTANCE
METALS
PHYSICAL PROPERTIES
SUPERCONDUCTING WIRES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WIRES