Fluctuation-induced noise in out-of-equilibrium disordered superconducting films

Aleksandra Petković; Valerii M. Vinokur

doi:10.1016/j.aop.2013.09.013

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arXiv · 1302.2901

Fluctuation-induced noise in out-of-equilibrium disordered superconducting films

Aleksandra Petković·Valerii M. Vinokur

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Abstract

We study out-of-equilibrium transport in disordered superconductors close to the superconducting transition. We consider a thin film connected by resistive tunnel interfaces to thermal reservoirs having different chemical potentials and temperatures. The nonequilibrium longitudinal current-current correlation function is calculated within the nonlinear sigma model description and nonlinear dependence on temperatures and chemical potentials is obtained. Different contributions are calculated, originating from the fluctuation-induced suppression of the quasiparticle density of states, Maki- Thompson and Aslamazov-Larkin processes. As a special case of our results, close-to-equilibrium we obtain the longitudinal ac conductivity using the fluctuation-dissipation theorem.

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Aleksandra Petković, Valerii M. Vinokur. 2013-02-12. Fluctuation-induced noise in out-of-equilibrium disordered superconducting films. https://doi.org/10.1016/j.aop.2013.09.013

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