Probing Vortex Dynamics in Superconductors with Nanoscale Weak-Pinning Channels
نویسنده
چکیده
We are fabricating nanoscale superconducting structures for guiding the motion of vortices.Vortices are quantized bundles of magnetic flux that thread many different superconductors over aparticular range of applied magnetic field. By etching asymmetric patterns for the channel walls,we are able to produce a vortex ratchet, which results in the directed motion of vortices when driven with an oscillatory force with zero mean. The presence of micron-scale periodic constrictions in the channels produces strong commensurability in the magnetic field dependence of the vortexdynamics through the channels.
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