Lattice effects and current reversal in superconducting ratchets
نویسنده
چکیده
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. PACS numbers: 05.40.-a, 02.30.Yy,74.25.Qt, 85.25.-j
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تاریخ انتشار 2008