The effect of superconducting fluctuations on the ac conductivity of a 2D electron system in the diffusive regime
Abstract
We report a complete analytical expression for the one-loop correction to the ac conductivity σ(ω) of a disordered two-dimensional electron system in the diffusive regime. The obtained expression includes the weak localization and Altshuler-Aronov corrections as well as the corrections due to superconducting fluctuations above superconducting transition temperature. The derived expression has no 1/(iω) divergency in the static limit, ω 0, in agreement with general expectations for the normal state conductivity of a disordered electron system.
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