Vortex core deformation and stepper motor behavior in a superconducting ratchet

Abstract

We investigated experimentally the frequency dependence of a superconducting vortex ratchet effect by means of electrical transport measurements and modeled it theoretically using the time dependent Ginzburg-Landau formalism. We demonstrate that the high frequency vortex behavior can be described as a discrete motion of a particle in a periodic potential, i.e. the so called stepper motor behavior. Strikingly, in the more conventional low frequency response a transition takes place from an Abrikosov vortex rectifier to a phase slip line rectifier. This transition is characterized by a strong increase in the rectified voltage and the appearance of a pronounced hysteretic behavior.

4 pages, 4 figures

References in corpus (8)

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• Superconducting Fluxon Pumps and Lenses
• Cooperative Transport of Brownian Particles
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• Pattern formation in vortex matter with pinning and frustrated inter-vortex interactions
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• Pinning, Flux Diodes, and Ratchets for Vortices Interacting with Conformal Pinning Arrays
• Multivortex states and dynamics in nonequilibrium quantum fluids
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• Collective Dynamics and Defect Generation for Wigner Crystal Ratchets
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• Magnetic Field Effects and Transverse Ratchets in Charge Lattices Coupled to Asymmetric Substrates