Quasiparticle properties of a coupled quantum-wire electron-phonon system

E. H. Hwang, Ben Yu-Kuang Hu, S. Das Sarma

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    Abstract

    We study leading-order many-body effects of longitudinal-optical phonons on electronic properties of one-dimensional quantum-wire systems. We calculate the quasiparticle properties of a weakly polar one-dimensional electron gas in the presence of both electron-phonon and electron-electron interactions, The leading-order dynamical screening approximation (GW approximation) is used to obtain the electron self-energy, the quasiparticle spectral function, and the quasiparticle damping rate in our calculation by treating electrons and phonons on an equal footing. Our theory includes effects (within the random-phase approximation) of Fermi statistics, Landau damping, plasmon-phonon mode coupling, phonon renormalization, dynamical screening, and impurity scattering. In general, electron-electron and electron-phonon many-body renormalization effects are found to be nonmultiplicative and nonadditive in our theoretical results for quasiparticle properties.
    Original languageEnglish
    JournalPhysical Review B
    Volume54
    Issue number7
    Pages (from-to)4996-5005
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1996

    Bibliographical note

    Copyright (1996) American Physical Society.

    Keywords

    • APPROXIMATION
    • GAAS
    • SCATTERING
    • WELLS
    • BALLISTIC TRANSPORT
    • GAS
    • HETEROSTRUCTURES
    • EMISSION
    • CONFINEMENT

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