Nonequilibrium Transport through a Kondo Dot: Decoherence Effects
Strongly Correlated Electrons
2007-05-23 v1 Mesoscale and Nanoscale Physics
Abstract
We investigate the effects of voltage induced spin-relaxation in a quantum dot in the Kondo regime. Using nonequilibrium perturbation theory, we determine the joint effect of self-energy and vertex corrections to the conduction electron T-matrix in the limit of transport voltage much larger than temperature. The logarithmic divergences, developing near the different chemical potentials of the leads, are found to be cut off by spin-relaxation rates, implying that the nonequilibrium Kondo-problem remains at weak coupling as long as voltage is much larger than the Kondo temperature.
Cite
@article{arxiv.cond-mat/0401180,
title = {Nonequilibrium Transport through a Kondo Dot: Decoherence Effects},
author = {J. Paaske and A. Rosch and J. Kroha and P. Wölfle},
journal= {arXiv preprint arXiv:cond-mat/0401180},
year = {2007}
}
Comments
16 pages, 4 figures