G. W. Ataklti, A. Yu. Aladyshkin, W. Gillijns, I. M. Nefedov, J. Van de Vondel, A. V. Silhanek, M. Kemmler, R. Kleiner, D. Koelle, V. V. Moshchalkov
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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http://arxiv.org/abs/1204.4690
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