Perturbative Approach to the Nonequilibrium Kondo Effect in a Quantum Dot
Mesoscale and Nanoscale Physics
2009-11-10 v2
Abstract
The theory of quantum transport through a dot under a finite bias voltage is developed using perturbation theory in the Keldysh formalism. It is found that the Kondo resonance splits into double peaks when the voltage exceeds the Kondo temperature, , which leads to the appearance of a second peak in conductance, in addition to the zero-bias peak. The possible relevance of the new peak to the 0.7 conductance anomaly observed in quantum point contact is discussed.
Cite
@article{arxiv.cond-mat/0211616,
title = {Perturbative Approach to the Nonequilibrium Kondo Effect in a Quantum Dot},
author = {Tatsuya Fujii and Kazuo Ueda},
journal= {arXiv preprint arXiv:cond-mat/0211616},
year = {2009}
}
Comments
5 pages, 6 figures, REVTeX4, Final version accepted for publication in Phys. Rev. B 2003. We decided to eliminate the result of U=8, and thus the old result should not be referred to