Stable vortex-antivortex molecules in mesoscopic superconducting triangles.
A thermodynamically stable vortex-antivortex pattern has been revealed in equilateral 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 mesoscopic triangle.
Theoretische Fysica van de Vaste Stoffen, Universiteit Antwerpen, Universiteitsplein 1, B-2610 Antwerpen, Belgium.
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Misko
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Fomin
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Moshchalkov