Superconducting vortices trapped in holes in Nb film |
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Superconducting vortices (white spots) are imaged by the magnetic decoration technique. |
Superconducting vortices (white spots) are imaged by the magnetic decoration technique. All vortices are trapped inside small blind holes etched into a thin Nb film. The size of the holes is less than 10 microns. The vortices can be directly visualized due to the fact that each hole has a layer of Nb at the bottom. The vortices are confined inside the holes due to to the presence of an "edge state", i.e. a strongly enhanced superconductivity localized around the holes.
1. A. Bezryadin and B. Pannetier, Journal of Low Temp. Phys., 102, (1996), p73.
2. A. Bezryadin, Yu.N. Ovchinnikov, and B. Pannetier, Phys. Rev. B 53, 8553—8560 (1996).
3. A. Bezryadin and B. Pannetier, "Edge superconducting states," Physica Scripta T66, 225—229 (1996).
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