Volume 88, Number 4, November 2009
Article Number 47001
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 25 November 2009
EPL, 88 (2009) 47001
DOI: 10.1209/0295-5075/88/47001

Nonequilibrium mesoscopic superconductors in a fluctuational regime

N. 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 $\sqrt{V-V_{\rm c}} $, where V is the external drive and $V_{{\rm c}}$ 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