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VOLUME 61 (1995) | ISSUE 2 | PAGE 112
Percolation mechanism for vortex depinning in the resistive state of thin films of type-II superconductors
A 2D percolation model successfully describes the depinning of vortices in thin films of type-II superconductors when there is a continuous distribution of pinning forces over a finite interval, and under certain other conditions. This model predicts a universal power-law current-voltage characteristic E=(j — jc)y 1.3-1.6) for the resistive state near the critical current jc. This prediction agrees satisfactorily with experimental data on high-rc superconductors. © 7995