Mesoscopic Kondo effect of a quantum dot embedded in an Aharonov-Bohm ring with intradot spin-flip scattering
Mesoscale and Nanoscale Physics
2009-11-10 v2 Strongly Correlated Electrons
Abstract
We study the Kondo effect in a quantum dot embedded in a mesoscopic ring taking into account intradot spin-flip scattering . Based on the finite- slave-boson mean-field approach, we find that the Kondo peak in the density of states is split into two peaks by this coherent spin-flip transition, which is responsible for some interesting features of the Kondo-assisted persistent current circulating the ring: (1) strong suppression and crossover to a sine function form with increasing ; (2) appearance of a "hump" in the -dependent behavior for odd parity. -induced reverse of the persistent current direction is also observed for odd parity.
Keywords
Cite
@article{arxiv.cond-mat/0405538,
title = {Mesoscopic Kondo effect of a quantum dot embedded in an Aharonov-Bohm ring with intradot spin-flip scattering},
author = {Bing Dong and G. H. Ding and H. L. Cui and X. L. Lei},
journal= {arXiv preprint arXiv:cond-mat/0405538},
year = {2009}
}
Comments
7 pages,6 figures, to be published by Europhys. Lett