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

Article

关键词: BALLISTIC TRANSPORT;    GAS;    CONFINEMENT;    EMISSION;    WELLS;    GAAS;    HETEROSTRUCTURES;    APPROXIMATION;    SCATTERING;   

DOI  :  10.1103/PhysRevB.54.4996

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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