Nonlinear Transport Properties of Quantum Dots
Condensed Matter
2009-10-22 v1
Abstract
The influence of excited levels on nonlinear transport properties of a quantum dot weakly coupled to leads is studied using a master--equation approach. A charging model for the dot is compared with a quantum mechanical model for interacting electrons. The current--voltage curve shows Coulomb blockade and additional finestructure that is related to the excited states of the correlated electrons. Unequal coupling to the leads causes asymmetric conductance peaks. Negative differential conductances are predicted due to the existence of excited states with different spins.
Cite
@article{arxiv.cond-mat/9306050,
title = {Nonlinear Transport Properties of Quantum Dots},
author = {W. Pfaff and D. Weinmann and W. Haeusler and B. Kramer and U. Weiss and PTB Braunschweig},
journal= {arXiv preprint arXiv:cond-mat/9306050},
year = {2009}
}
Comments
11 pages (excl. Figures), 3 Figures are available on request, RevTeX