Phys. Rev. Lett. 75, 2400–2403 (1995)Flux Droplet Formation in NbSe2 Single Crystals Observed by DecorationReceived 1 May 1995; published in the issue dated 18 September 1995 A potential barrier of geometrical origin, characterized by a barrier field Hp, governs vortex penetration in thin superconducting samples. We observed this effect by the decoration of crystals of NbSe2. Upon zero field cooling and applying a field Ha<Hp≈5mT, vortices form a belt at the sample edges. At Ha≈Hp flux begins to penetrate in the form of dropletlike intrusions. The orientational correlation length for the vortex pattern inside the “droplets” is much larger than for the field-cooled patterns. This we interpret as recrystallization of the moving flux line lattice. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.2400
DOI:
10.1103/PhysRevLett.75.2400
PACS:
74.60.Ge, 74.60.Jg
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