Dynamics of magnetic flux lines in the presence of correlated disorder

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dc.creatorBullard, Thomas J.
dc.creatorDas, Jayajit
dc.creatorTauber, Uwe C.
dc.date2003-05-03
dc.date.accessioned2026-07-07T02:51:10Z
dc.date.available2026-07-07T02:51:10Z
dc.descriptionWe investigate the dynamics of interacting magnetic flux lines driven by an external current in the presence of linear pinning centers, arranged either in a periodic square lattice or placed randomly in space, by means of three-dimensional Monte Carlo simulations. Compared to the non-interacting case, the repulsive forces between the vortices reduce the critical current J_c, as determined from the depinning threshold in the current-voltage (I-V) characteristics. Near the depinning current J_c, the voltage power spectrum S(w) reveals broad-band noise, characterized by a $1/w^a$ power law decay with a <= 2. At larger currents the flux lines move with an average velocity v_{cm}. For a periodic arrangement of columnar pins with a lattice constant $d$ and just above J_c, distinct peaks appear in the voltage noise spectrum S(w) at w ~ v_{cm}/d which we interpret as the signature of stick-slip flux line motion.
dc.descriptionLatex, 10 pages, four eps figures included
dc.identifierhttps://arxiv.org/abs/cond-mat/0305061
dc.identifierhttp://arxiv.org/abs/cond-mat/0305061
dc.identifierIn: Trends in Superconductivity Research (P.S. Lewis, ed.) 2004, 63
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21352
dc.subjectSuperconductivity
dc.subjectStatistical Mechanics
dc.titleDynamics of magnetic flux lines in the presence of correlated disorder
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