Three-orbital Kondo effect in single quantum dot system with plural electrons
Abstract
We study the Kondo effect and related transport properties in orbitally degenerate vertical quantum dot systems with plural electrons. Applying the non-crossing approximation to the three-orbital Anderson impurity model with the finite Coulomb interaction and Hund-coupling, we investigate the magnetic-field dependence of the conductance and thermopower. We also introduce an additional orbital splitting to take account of the realistic many-body effect in the vertical quantum dot system. It is clarified how the three-orbital Kondo effect influences the transport properties via the modulation of the Kondo temperature and unitary limit of transport quantities due to the change of the symmetry in the system.
Cite
@article{arxiv.0807.1780,
title = {Three-orbital Kondo effect in single quantum dot system with plural electrons},
author = {Tomoko Kita and Rui Sakano and Takuma Ohashi and Sei-ichiro Suga},
journal= {arXiv preprint arXiv:0807.1780},
year = {2008}
}
Comments
11 pages, 10 figures, accepted for publication in J. Phys. Soc. Jpn