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

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

2000-04-04

arxiv.org/abs/cond-mat/0004054v1

Phys. Rev. Lett. 85, 5416 (2000)

Physics

Condensed Matter

Superconductivity

4 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevLett.85.5416

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 2D-3D transition from vortex lines to decoupled pancakes as a function of relative interlayer coupling strength, with an accompanying large increase in the critical current remniscent of a second peak effect. We find that decoupled pancakes, when driven, simultaneously recouple and order into a crystalline-like 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.

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