Abstract
While the time-dependent Ginzburg-Landau theory successfully describes a number of experimental results for homogeneous high- superconductors, the proper value of the characteristic depairing electric field was recently found unreasonably small for Bi-Sr-Ca-Cu-O thin films. We present numerical simulations which show that these features can be the consequence of smooth spatial inhomogeneity of the local critical temperature. Because of the interplay of percolation and superconducting transition, even a small disorder affects strongly the nonlinear excess conductivity in the transition region, causing considerable rescaling of the characteristic electric field.
- Received 15 September 2005
DOI:https://doi.org/10.1103/PhysRevB.73.012508
©2006 American Physical Society