Current reversal in collective ratchets induced by lattice instability
classification
❄️ cond-mat.stat-mech
cond-mat.supr-con
keywords
collectivecurrentinducedinstabilitymechanismratchetsreversalsuperconducting
read the original abstract
A collective mechanism for current reversal in superconducting vortex ratchets is proposed. The mechanism is based on a two-dimensional instability of the ground state (T=0) of the system. We illustrate our results with numerical simulations and experiments in Nb superconducting films fabricated on top of Si substrates with artificially induced asymmetric pinning centers.
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