Enhanced Superconducting Vortex Pinning with Arrays of Nanomagnetic Pinning Sites
Vortex pinning in superconductors with artificially produced pinning arrays provide an ideal controllable model system for a periodic system moving in the presence of a periodic potential. Additionally, this type of pinning may provide the means for enhancing critical current densities for superconducting transmission lines and reducing noise in a variety of superconductivity based devices.
Modern nanolithography enables positioning pinning structures at length scales similar to the vortex interaction length in superconductors. This provides the means to manipulate the potential-energy landscape and study superconducting vortices at the interaction length scales. This talk will cover several topics relating to vortex pinning including disorder in the pinning lattice, using vortices to rectify an AC signal, and shearing the vortex lattice using the corbino geometry.
This research was funded by the US-NSF DMR award #0800207.