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Lattice effects and current reversal in superconducting ratchets

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2007-10-09
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IOP Publishing
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Competition between the vortex lattice and a lattice of asymmetric artificial defects is shown to play a crucial role in ratchet experiments in superconducting films. We present a novel and collective mechanism for current reversal based on a reconfiguration of the vortex lattice. In contrast to previous models of vortex current reversal, the mechanism is based on the global response of the vortex lattice to external forces
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© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. We acknowledge funding support by Spanish Ministerio de Educación y Ciencia, grants NAN04-09087, FIS05-07392, MAT05-23924E, and MOSAICO; CAM grant S-0505/ESP/0337, and UCM-Santander. Also, computer simulations of this work were performed partly at the ‘Cluster de cálculo para Técnicas Físicas’ of UCM, funded in part by UE-FEDER program and in part by UCM and in the ‘Aula Sun Microsystems’ at UCM.
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