Localization of superconductivity in superconductor-electromagnet   hybrids
  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. 
G.W. Ataklti, A.Yu. Aladyshkin, W. Gillijns, I.M. Nefedov, J. Van de   Vondel, A.V. Silhanek, M. Kemmler, R.Kleiner, D. Koel...
cond-mat.supr-con cond-mat.mes-hall