Plastic Motion of a Vortex Lattice Driven by Alternating Current
Plastic Motion of a Vortex Lattice Driven by Alternating Current
We have measured the response of the vortex system in the low ${T}_{c}$ superconductor $2\mathrm{H}\ensuremath{-}{\mathrm{NbSe}}_{2}$ to finite frequency drives. In a well-defined range of fields, temperatures, and driving amplitudes the system exhibits novel nonlinear phenomena. Most strikingly, the vortices can move easily in response to currents that are well below …