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- W2011128437 abstract "The dynamical exchange decoupling method for including exchange in the dielectric function of the electron gas is applied to one-dimensional systems with a tight-binding energy band. Depending on the bandwidth and the position of the Fermi energy in the band, dynamical exchange effects are shown to have appreciable effects on the plasmon dispersion. For propagation of the plasmon along the strand axis, and in the long-wavelength limit, exchange effects drastically lower the slope of the plasmon dispersion. For non-parallel incidence, the exchange effects are less pronounced, and extended over a smaller wave vector region.Die dynamische Austauschentkopplungsmethode fur die Einbeziehung des Austauschs in die dielektriscfhe Funktion des Elektronengases wird auf eindimensionale Systeme mit einem „tightbinding” -Energieband angewendet. Es wird gezeigt, das abhangig von der Breite der Bander und der Lage der Fermienergie im Band die dynamischen Austauscheffekte einen betrachtlichen Einflus auf die Plasmonendispersion haben. Fur die Ausbreitung eines Plasmons in Richtung der „Strand” -Achse und im Grenzfall langer Wellen erniedrigen die Austauscheffekte drasticsh den Anstieg der Plasmonendispersion. Fur nichtparallelen Einfall sind die Austauscheffekte geringer ausgepragt und uber einen kleineren Bereich des Wellenvektors ausgedehnt." @default.
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- W2011128437 date "1982-05-01" @default.
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- W2011128437 title "Exchange Contributions and Plasmon Spectra of One-Dimensional Systems" @default.
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- W2011128437 doi "https://doi.org/10.1002/pssb.2221110110" @default.
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