Resonant Tunneling through Multi-Level and Double Quantum Dots
Condensed Matter
2009-10-28 v1
Abstract
We study resonant tunneling through quantum-dot systems in the presence of strong Coulomb repulsion and coupling to the metallic leads. Motivated by recent experiments we concentrate on (i) a single dot with two energy levels and (ii) a double dot with one level in each dot. Each level is twofold spin-degenerate. Depending on the level spacing these systems are physical realizations of different Kondo-type models. Using a real-time diagrammatic formulation we evaluate the spectral density and the non-linear conductance. The latter shows a novel triple-peak resonant structure.
Cite
@article{arxiv.cond-mat/9612146,
title = {Resonant Tunneling through Multi-Level and Double Quantum Dots},
author = {T. Pohjola and J. König and M. M. Salomaa and J. Schmid and H. Schoeller and Gerd Schön},
journal= {arXiv preprint arXiv:cond-mat/9612146},
year = {2009}
}
Comments
4 pages, ReVTeX, 4 Postscript figures