Data di Pubblicazione:
2001
Citazione:
Flux front penetration in disordered superconductors / S. Zapperi, A.A. Moreira, A.J. S. Andrade Jr.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 86:16(2001), pp. 3622-3625.
Abstract:
We investigate flux front penetration in a disordered type-II superconductor by molecular dynamics simulations of interacting vortices and find scaling laws for the front position and the density profile. The scaling can be understood by performing a coarse graining of the system and writing a disordered nonlinear diffusion equation. Integrating numerically the equation, we observe a crossover from flat to fractal front penetration as the system parameters are varied. The value of the fractal dimension indicates that the invasion process is described by gradient percolation.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Bean critical-stae; magnetization hysteresis loops; vortex avalanches; plastic-flow; model; vortices; dynamics; lattice; density; films
Elenco autori:
S. Zapperi, A.A. Moreira, A.J. S. Andrade Jr.
Link alla scheda completa: