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Coherent transport through an interacting double quantum dot: Beyond sequential tunneling

Pedersen, Jonas LU ; Lassen, Benny; Wacker, Andreas LU and Hettler, Matthias H. (2007) In Physical Review B (Condensed Matter and Materials Physics) 75(23). p.1-235314
Abstract
Various causes for negative differential conductance in transport through an interacting double quantum dot are investigated. Particular focus is given to the interplay between the renormalization of the energy levels due to the coupling to the leads and the decoherence of the states. The calculations are performed within a basis of many-particle eigenstates and we consider the dynamics given by the von Neumann equation taking into account also processes beyond sequential tunneling. A systematic comparison between the levels of approximation and also with different formalisms is performed. It is found that the current is qualitatively well described by sequential processes as long as the temperature is larger than the level broadening... (More)
Various causes for negative differential conductance in transport through an interacting double quantum dot are investigated. Particular focus is given to the interplay between the renormalization of the energy levels due to the coupling to the leads and the decoherence of the states. The calculations are performed within a basis of many-particle eigenstates and we consider the dynamics given by the von Neumann equation taking into account also processes beyond sequential tunneling. A systematic comparison between the levels of approximation and also with different formalisms is performed. It is found that the current is qualitatively well described by sequential processes as long as the temperature is larger than the level broadening induced by the contacts. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
75
issue
23
pages
1 - 235314
publisher
American Physical Society
external identifiers
  • wos:000247624900086
  • scopus:34347395962
ISSN
1098-0121
DOI
10.1103/PhysRevB.75.235314
language
English
LU publication?
yes
id
e10d9730-71e2-4807-ba0b-c7a1d994c98d (old id 646219)
date added to LUP
2007-12-17 10:34:27
date last changed
2017-11-05 04:32:10
@article{e10d9730-71e2-4807-ba0b-c7a1d994c98d,
  abstract     = {Various causes for negative differential conductance in transport through an interacting double quantum dot are investigated. Particular focus is given to the interplay between the renormalization of the energy levels due to the coupling to the leads and the decoherence of the states. The calculations are performed within a basis of many-particle eigenstates and we consider the dynamics given by the von Neumann equation taking into account also processes beyond sequential tunneling. A systematic comparison between the levels of approximation and also with different formalisms is performed. It is found that the current is qualitatively well described by sequential processes as long as the temperature is larger than the level broadening induced by the contacts.},
  author       = {Pedersen, Jonas and Lassen, Benny and Wacker, Andreas and Hettler, Matthias H.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {23},
  pages        = {1--235314},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Coherent transport through an interacting double quantum dot: Beyond sequential tunneling},
  url          = {http://dx.doi.org/10.1103/PhysRevB.75.235314},
  volume       = {75},
  year         = {2007},
}