Coulomb drag effect in parallel quantum dots

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Author
Tanatar, B.
Moldoveanu, V.
Date
2009Journal Title
AIP Conference Proceedings
ISSN
0094-243X
Publisher
A I P Publishing LLC
Volume
47
Pages
87 - 93
Language
English
Type
Conference Paper
Metadata
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http://hdl.handle.net/11693/28677Abstract
We study theoretically the electronic transport in parallel few-level quantum dots in the presence of both intradot and interdot long-range Coulomb interaction. Each dot is connected to two leads and the steady-state currents are calculated within the Keldysh formalism using the random-phase approximation for the interacting Green functions. Due to the momentum transfer mechanism between the two systems it is possible to get a nonvanishing current through an unbiased Coulomb-blockaded dot if the other dot is set in the nonlinear transport regime. The transitions between the levels of the passive dot reduce the drag current and lead to negative differential conductance.