Virtanen, P., Zou, J., Sosnin, I., Petrashov, Victor and Heikkila, T. T. (2007) Phase states of multiterminal mesoscopic normal-metal-superconductor structures. Physical Review Letters, 99 (21).
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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.
This is a Submitted version This version's date is: 23/11/2007 This item is not peer reviewed
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