title: Phase states of multiterminal mesoscopic normal-metal-superconductor structures.
abstract: We study a mesoscopic normal-metal structure with four superconducting contacts, two of which are joined into a loop. The structure undergoes transitions between three (meta)stable states, with different phase configurations triggered by nonequilibrium conditions. These transitions result in spectacular changes in the magnetoresistance. We find a qualitative agreement between the experiments and a theory based on the quasiclassical Keldysh formalism.
authors.affiliation: Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, FIN-02015 TKK, Finland.
authors.forename: P
authors.initials: P
authors.lastname: Virtanen
authors.forename: J
authors.initials: J
authors.lastname: Zou
authors.forename: I
authors.initials: I
authors.lastname: Sosnin
authors.forename: V T
authors.initials: VT
authors.lastname: Petrashov
authors.forename: T T
authors.initials: TT
authors.lastname: Heikkilä