title: Type-1.5 superconducting state from an intrinsic proximity effect in two-band superconductors.
abstract: We show that in multiband superconductors, even an extremely small interband proximity effect can lead to a qualitative change in the interaction potential between superconducting vortices by producing long-range intervortex attraction. This type of vortex interaction results in an unusual response to low magnetic fields leading to phase separation into domains of two-component Meissner states and vortex droplets.
authors.affiliation: Department of Theoretical Physics, The Royal Institute of Technology, Stockholm, SE-10691 Sweden.
authors.forename: Egor
authors.initials: E
authors.lastname: Babaev
authors.forename: Johan
authors.initials: J
authors.lastname: Carlström
authors.forename: Martin
authors.initials: M
authors.lastname: Speight