Static and dynamic coupling transitions of vortex lattices in disordered anisotropic superconductors

摘要

We use three-dimensional molecular dynamics simulations of magneticallyinteracting pancake vortices to study vortex matter in disordered, highlyanisotropic materials such as BSCCO. We observe a sharp 2D-3D transition fromvortex lines to decoupled pancakes as a function of relative interlayercoupling strength, with an accompanying large increase in the critical currentremniscent of a second peak effect. We find that decoupled pancakes, whendriven, simultaneously recouple and order into a crystalline-like state at highdrives. We construct a dynamic phase diagram and show that the dynamicrecoupling transition is associated with a double peak in dV/dI.