Coulomb drag in parallel quantum dots
Europhysics Letters Association
Moldoveanu, V., & Tanatar, B. (2009). Coulomb drag in parallel quantum dots. EPL (Europhysics Letters), 86(6), 67004.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/11839
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 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. We also discuss the dependence on temperature and the role of the lead-dot coupling. Copyright (C) EPLA, 2009
Published ashttp://dx.doi.org/DOI: 10.1209/0295-5075/86/67004
- Department of Physics