Lattice effects and current reversal in superconducting ratchets
L. Dinis, E.M. Gonzalez, J. V. Anguita, J.M.R. Parrondo, J.L. Vicent
TL;DR
This paper reveals how the interplay between vortex lattices and artificial defect lattices causes current reversal in superconducting films through a collective reconfiguration mechanism, differing from previous models.
Contribution
It introduces a novel collective mechanism for vortex current reversal driven by vortex lattice reconfiguration, contrasting with earlier localized models.
Findings
Vortex lattice and defect lattice competition influences ratchet behavior.
A new collective reconfiguration mechanism causes current reversal.
The mechanism depends on the global vortex lattice response.
Abstract
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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