On the origin of high smectic fluidity of the vortex lattice in a 2D superconductorV. Zhuravlev and T. Maniv
Chemistry Department, Technion-Israel Institute of Technology - Haifa 32000, Israel
received 16 November 2005; accepted in final form 16 January 2006
published online 27 January 2006
We study the response of the vortex lattice in a strongly type-II 2D superconductor to quasi-static sweeping magnetic induction using the Ginzburg-Landau approach in the lowest Landau level approximation. It is found that, due to small size and relative softness of the vortex core as compared to the atomic core of a typical crystal potential, the vortices tend to flow in independently moving channels with smectic structure. A model for calculating the friction coefficient of moving vortices in the presence of a few pinning centers under conditions of minimal power dissipation is presented.
74.25.Qt - Vortex lattices, flux pinning, flux creep.
74.40.+k - Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.).
© EDP Sciences 2006