Collective Multi-Vortex States in Periodic Arrays of Traps

Details Collective Multi-Vortex States in Periodic Arrays of Traps Collective Multi-Vortex States in Periodic Arrays of Traps

2000-04-12

arxiv.org/abs/cond-mat/0004203v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.85.2372

We examine the vortex states in a 2D superconductor interacting with a square array of pinning sites. As a function of pinning size or strength we find a series of novel phases including multi-vortex and composite superlattice states such as aligned dimer and trimer configurations at individual pinning sites. Interactions of the vortices give rise to an orientational ordering of the internal vortex structures in each pinning site. We also show that these vortex states can give rise to a multi-stage melting behavior.

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