Quasiparticle Properties of a Coupled Two-Dimensional Electron-Phonon System. (Reannouncement with New Availability Information).

摘要

We calculate quasiparticle properties of a weakly polar two-dimensional electron gas by taking into account both electron-electron Coulomb and electron-optical-phonon Frohlich interactions. Electronic self-energy is calculated exactly in the leading order of the total effective dynamical interaction. The total effective dynamical interaction is obtained within the random-phase approximation (RPA) by starting from the total bare interaction, which includes both Coulomb and Frohlich interactions and then by screening it with all the bubble diagrams. Our theory thus treats Coulomb and Frohlich interactions on an equal footing and includes all effects (within the RPA) of Fermi statistics, Landau damping, plasmon-phonon mode coupling, phonon self-energy correction, and dynamical screening.