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Localization of superconductivity in superconductor–electromagnet hybrids

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We investigate the nucleation of superconductivity in a superconducting Al strip under the influence of the magnetic field generated by a current-carrying Nb wire, perpendicularly oriented and located underneath the strip. The inhomogeneous magnetic field, induced by the Nb wire, produces a spatial modulation of the critical temperature T c, leading to a controllable localization of the superconducting order parameter (OP) wavefunction. We demonstrate that close to the phase boundary T c(B ext) the localized OP solution can be displaced reversibly by either applying an external perpendicular magnetic field B ext or by changing the amplitude of the inhomogeneous field.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/25/6/065015

Publication date: June 1, 2012

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