Nonequilibrium cotunneling through a three-level quantum dot

Schmaus, S. and Koerting, V. and Paaske, J. and Jespersen, T. S. and Nygard, J. and Wölfle, P.. (2009) Nonequilibrium cotunneling through a three-level quantum dot. Physical Review B, Vol. 79, H. 4 , 045105, 11 S..

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A5262352

Downloads: Statistics Overview


We calculate the nonlinear cotunneling conductance through a quantum dot with three electrons occupying the three highest-lying energy levels. Starting from a three-orbital Anderson model, we apply a generalized Schrieffer-Wolff transformation to derive an effective Kondo model for the system. Within this model we calculate the nonequilibrium occupation numbers and the corresponding cotunneling current to leading order in the exchange couplings. We identify the inelastic cotunneling thresholds and their splittings with applied magnetic field, and make a qualitative comparison to recent experimental data on carbon nanotube and InAs quantum-wire quantum dots. Further predictions of the model such as cascade resonances and a magnetic-field dependence of the orbital level splitting are not yet observed but within reach of recent experimental work on carbon nanotube and InAs-nanowire quantum dots.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Koerting, Verena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
Related URLs:
Identification Number:
Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:49

Repository Staff Only: item control page