Volume 98, Number 1, April 2012
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||04 April 2012|
Transport in quantum dot stacks using the transfer Hamiltonian method in self-consistent field regime
MIND/IN 2UB Departament d'Electrònica, Universitat de Barcelona - C/Martí i Franquès 1, E-08028 Barcelona, Spain, EU
Accepted: 2 March 2012
The non-coherent rate equation approach to the electrical transport in a serial quantum dot system is presented. The charge density in each quantum dot is obtained using the transfer Hamiltonian formalism for the current expressions. The interactions between the quantum dots and between the quantum dots and the electrodes are introduced by transition rates and capacitive couplings. Within this framework analytical expressions for the current and the charge in each quantum dot are presented. The effects of the local potential are computed within the self-consistent field regime. Despite the simplicity of the model, well-known effects are satisfactorily explained and reproduced. We also show how this approach can be extended into a more general case.
PACS: 72.10.Bg – General formulation of transport theory / 73.63.-b – Electronic transport in nanoscale materials and structures / 73.63.Kv – Quantum dots
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.