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      Energy-transfer rate in a double-quantum-well system due to Coulomb coupling

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      Author(s)
      Senger, R. T.
      Tanatar, Bilal
      Date
      2002
      Source Title
      Solid State Communications
      Print ISSN
      0038-1098
      Publisher
      Elsevier
      Volume
      121
      Issue
      2-3
      Pages
      61 - 65
      Language
      English
      Type
      Article
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      Abstract
      We study the energy-transfer rate for electrons in a double-quantum-well structure, where the layers are coupled through screened Coulomb interactions. The energy-transfer rate between the layers (similar to the Coulomb drag effect in which the momentum-transfer rate is considered) is calculated as functions of electron densities, interlayer spacing, the temperature difference of the 2DEGs, and the electron drift velocity in the drive layer. We employ the full wave vector and frequency-dependent random-phase approximation at finite temperature to describe the effective interlayer Coulomb interaction. We find that the collective modes (plasmons) of the system play a dominant role in the energy-transfer rates.
      Keywords
      A. Semiconductors Quantum well
      D. Tunneling
      Approximation theory
      Carrier concentration
      Electric field effects
      Electron tunneling
      Energy transfer
      Semiconductor device structures
      Coulomb coupling
      Semiconductor quantum wells
      Permalink
      http://hdl.handle.net/11693/24746
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/S0038-1098(01)00477-X
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      • Department of Physics 2397
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