Influence of the confinement geometry on surface superconductivity
Abstract
The nucleation field for surface superconductivity, Hc3, depends on the geometrical shape of the mesoscopic superconducting sample and is substantially enhanced with decreasing sample size. As an example we studied circular, square, triangular and wedge shaped disks. For the wedge the nucleation field diverges as Hc3/Hc2=3/α with decreasing angle (α) of the wedge, where Hc2 is the bulk upper critical field.
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