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      Coulomb drag in parallel quantum dots

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      Author
      Oldoveanu, V.
      Tanatar, Bilal
      Date
      2009-07-9
      Source Title
      EPL
      Print ISSN
      0295-5075
      Publisher
      Europhysics Letters Association
      Volume
      86
      Issue
      6
      Pages
      67004-1 - 67004-6
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      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
      Keywords
      Electron-systems
      Fluctuations
      Wire
      Permalink
      http://hdl.handle.net/11693/11839
      Published Version (Please cite this version)
      https://doi.org/10.1209/0295-5075/86/67004
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