Vortex depinning in superconducting wire networks |
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| Authors: | N B Kopnin P I Soininen |
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| Affiliation: | (1) Centre de Recherches sur les Très Basses Temperatures, CNRS, 25 Avenue des Martyrs, BP 166, 38042 Grenoble Cedex 9, France;(2) Low Temperature Laboratory, Helsinki University of Technology, Otakaari 3 A, SF 02150 Espoo, Finland;(3) Present address: L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, Kosygin Street 2, GSP-1, 117940 Moscow, Russia;(4) Present address: Department of Physics and Astronomy, McMaster University, L8S 4M1 Hamilton, Ontario, Canada |
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| Abstract: | The pinning of vortices at low inductions is considered within the Ginzburg-Landau theory for both dense and sparse superconducting wire networks with periods d   (T)and d  (T),respectively. For dense networks, the depinning current is calculated analytically and found to be exponentially small compared to the characteristic pair-breaking current. The depinning current for sparse networks is obtained numerically. The anomalous compression modulus for a vortex lattice in a thin superconducting film is calculated, and the effects of the vortex lattice rigidity on thermally activated vortex creep in a dense network are investigated. |
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