Localization of superconductivity in superconductor–electromagnet hybrids
Abstract: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
Publication date: June 1, 2012