Geometrical confinement effects in layered mesoscopic vortex-matter

Abstract

We study geometrical confinement effects in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesoscopic vortex-matter with edge-to-surface ratio of $7-12$%. Samples have in-plane square and circular edges, 30\,$\mu$m widths, and $\sim 2\mu$m thickness. Direct vortex imaging reveals the compact planes of the structure align with the sample edge by introducing topological defects. The defects density is larger for circular than for square edges. Molecular dynamics simulations suggest this density is not an out-of-equilibrium property but rather determined by the geometrical confinement.

accepted in Journal of Low Temperature Physics

Cited by in corpus (6)

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• Excess of topological defects induced by confinement in vortex nanocrystals
• Vortex shells in mesoscopic triangles of amorphous superconducting thin films
• Enhancement of penetration field in vortex nanocrystals due to Andreev bound states
• Bridge in micron-sized Bi2Sr2CaCu2O8+y sample act as converging lens for vortices