Nonequilibrium mesoscopic superconductors in a fluctuational regimeN. Chtchelkatchev1, 2 and V. Vinokur2
1 Department of Theoretical Physics, Moscow Institute of Physics and Technology - 141700 Moscow, Russia
2 Argonne National Laboratory - Argonne, IL 60439, USA
received 27 August 2009; accepted in final form 23 October 2009; published November 2009
published online 25 November 2009
We develop a non-equilibrium Ginzburg-Landau–type theory of the far-from-equilibrium dynamics of superconductors in a fluctuational regime and apply our approach to quantitative description of a superconductor island in a stationary nonequilibrium state. We derive the effective temperature of the nonequilibrium state and find fluctuational contributions to the magnetic susceptibility showing that it becomes a singular function of , where V is the external drive and is its “critical” value at which the nonequilibrium phase transition takes place.
73.23.-b - Electronic transport in mesoscopic systems.
74.45.+c - Proximity effects; Andreev effect; SN and SNS junctions.
74.81.Fa - Josephson junction arrays and wire networks.
© EPLA 2009