Vortex nucleation in type-I superconducting layer covering a type-II superconductor

This is the authors' abstract. We don't add key points for this paper.

Within the framework of the Ginzburg-Landau model, it has been shown that in a composite system consisting of type-I and type-II superconductors with a large coherence length difference ξIξII, Abrikosov vortices may appear in the type-I superconductor as superconductivity is restored upon decreasing the magnetic field. The vortices enter the type-I superconductor through its boundary with the vacuum and reach the boundary with the type-II superconductor, which is in the Meissner state. We have found conditions under which the chain of vortices can exist at the I/II interface even at zero magnetic field.