期刊
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
卷 23, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-2048/23/2/025023
关键词
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资金
- US Department of Energy [DE-FG0209ER46613]
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. 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.
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