Localization of superconductivity in superconductor-electromagnet hybrids

Details Localization of superconductivity in superconductor-electromagnet hybrids Localization of superconductivity in superconductor-electromagnet hybrids

2012-04-20

arxiv.org/abs/1204.4690v1

Supercond. Sci. Technol. 25, 065015 (2012)

Physics

Condensed Matter

Superconductivity

10 pages, 6 figures

Scientific paper

10.1088/0953-2048/25/6/065015

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) wave function. 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.

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