Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot
Mesoscale and Nanoscale Physics
2009-10-31 v1 Strongly Correlated Electrons
Abstract
We investigate the persistent current influenced by the spin fluctuations in a mesoscopic ring weakly coupled to a quantum dot. It is shown that the Kondo effect gives rise to some unusual features of the persistent current in the limit where the charge transfer between two subsystems is suppressed. Various aspects of the crossover from a delocalized to a localized dot limit are discussed in relation with the effect of the coherent response of the Kondo cloud to the Aharonov-Bohm flux.
Cite
@article{arxiv.cond-mat/0011215,
title = {Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot},
author = {Sam Young Cho and Kicheon Kang and Chul Koo Kim and Chang-Mo Ryu},
journal= {arXiv preprint arXiv:cond-mat/0011215},
year = {2009}
}
Comments
4 pages, 2 figures