Nonequilibrium steady states of driven magnetic flux lines in disordered type-II superconductors
We investigate driven magnetic flux lines in layered type-II superconductors subject to various configurations of strong point or columnar pinning centers by means of a three-dimensional elastic line model and Metropolis Monte Carlo simulations. We characterize the resulting nonequilibrium steady st...
Saved in:
Published in | Superconductor science & technology Vol. 23; no. 2 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
IOP Publishing
23.12.2009
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | We investigate driven magnetic flux lines in layered type-II superconductors subject to various configurations of strong point or columnar pinning centers by means of a three-dimensional elastic line model and Metropolis Monte Carlo simulations. We characterize the resulting nonequilibrium steady states by means of the force–velocity/current–voltage curve, static structure factor, mean vortex radius of gyration, number of double-kink and half-loop excitations, and velocity/voltage noise spectrum. Here, we compare the results for the above observables for randomly distributed point and columnar defects, and demonstrate that the three-dimensional flux line structures and their fluctuations lead to a remarkable variety of complex phenomena in the steady-state transport properties of bulk superconductors. |
---|---|
Bibliography: | USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division FG02-09ER46613; SC0002308 |
ISSN: | 0953-2048 1361-6668 |