Static and Dynamic Coupling Transitions of Vortex Lattices in Disordered Anisotropic Superconductors

C. J. OLSON, G. T. ZIMÁNYI, A. B. KOLTON, AND N. GRØNBECH-JENSEN

PHYSICAL REVIEW LETTERS

The American Physical Society

Lugar: USA; Año: 2000 vol. 85 p. 5416 - 5419

0031-9007

We use three-dimensional molecular dynamics simulations of magnetically interacting pancake vortices to study vortex matter in disordered, highly anisotropic materials such as BSCCO. We observe a sharp 3D-2D transition from vortex lines to decoupled pancakes as a function of relative interlayer coupling strength, with an accompanying large increase in the critical current reminiscent of a second peak effect. We find that decoupled pancakes, when driven, simultaneously recouple and order into a crystallinelike state at high drives. We construct a dynamic phase diagram and show that the dynamic recoupling transition is associated with a double peak in dV/dI.