Vortex core deformation and stepper-motor ratchet behavior in a superconducting aluminum film containing an array of holes

Phys Rev Lett. 2011 Apr 1;106(13):137003. doi: 10.1103/PhysRevLett.106.137003. Epub 2011 Mar 29.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aluminum / chemistry*
  • Electric Conductivity*
  • Microscopy, Atomic Force
  • Models, Theoretical*

Substances

  • Aluminum