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    Theory of the Linewidth of Intersubband Plasmons in Quantum Wells

    Ullrich, Carsten A.
    Vignale, Giovanni, 1957-
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    [PDF] TheoryLinewidthIntersubbandPlasmons.pdf (135.2Kb)
    Date
    2001
    Format
    Article
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    Abstract
    Intersubband (ISB) plasmons in remotely doped wide quantum wells acquire a linewidth even at zero temperature and in-plane wave vector q∥ = 0 by a combination of intrinsic (electron-electron interaction) and extrinsic effects (impurities and interface roughness). We present a quantitatively accurate theory of the linewidth that treats both effects on equal footing and from first principles by a combination of time-dependent density-functional theory with the memory function formalism. Comparison with recent optical absorption experiments shows that the ISB plasmon linewidth has a significant contribution from electron-electron interaction, and is only weakly related to the mobility.
    URI
    http://hdl.handle.net/10355/7920
    Citation
    Phys. Rev. Lett. 87, 037402 (2001)
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