Stable vortex-antivortex molecules in mesoscopic superconducting triangles
V. R. Misko (1), V. M. Fomin (1), J. T. Devreese (1), V. V., Moshchalkov (2) ((1) TFVS, Universiteit Antwerpen - UIA, (2) VSM, Katholieke, Universiteit Leuven)
TL;DR
This paper reports the discovery of thermodynamically stable vortex-antivortex molecules in mesoscopic type I superconducting triangles, highlighting a contrast with type II superconductors where such patterns are unstable.
Contribution
It demonstrates the existence of stable vortex-antivortex patterns in mesoscopic type I superconductors, driven by vortex interactions and geometric confinement.
Findings
Stable vortex-antivortex molecules observed in type I superconducting triangles
Contrasts with instability of similar patterns in type II superconductors
Highlights role of geometry and interactions in vortex stability
Abstract
A thermodynamically stable vortex-antivortex pattern has been revealed in mesoscopic type I superconducting triangles, contrary to type II superconductors where similar patterns are unstable. The stable vortex-antivortex "molecule" appears due to the interplay between two factors: a repulsive vortex-antivortex interaction in type I superconductors and the vortex confinement in the triangle.
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