Dephasing in Disordered Conductors due to Fluctuating Electric Fields
Abstract
We develop a novel eikonal expansion for the Cooperon to study the effect of space- and time-dependent electric fields on the dephasing rate of disordered conductors. For randomly fluctuating fields with arbitrary covariance we derive a general expression for the dephasing rate which is free of infrared divergencies in reduced dimensions. For time-dependent external fields with finite wavelength and sufficiently small amplitude we show that the dephasing rate is proportional to the square root of the electromagnetic power coupled into the system, in agreement with data by Wang and Lindelof [Phys. Rev. Lett. {\bf{59}}, 1156 (1987)].
Cite
@article{arxiv.cond-mat/9906320,
title = {Dephasing in Disordered Conductors due to Fluctuating Electric Fields},
author = {Axel Voelker and Peter Kopietz},
journal= {arXiv preprint arXiv:cond-mat/9906320},
year = {2009}
}
Comments
17 Latex-pages, one figure; we now give more technical details and discuss the screening problem more carefully; to appear in Phys. Rev. B