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28 March 2024
 
  » pubmed » pmid15903582

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Dielectric matrix and plasmon dispersion in strongly coupled electronic bilayer liquids
Kenneth I Golden ; Hania Mahassen ; Gabor J Kalman ; Gaetano Senatore ; F Rapisarda ;
Date 28 Feb 2005
Journal Phys Rev E, 71 (3 Pt 2B), 036401
AbstractWe develop a dielectric matrix and analyze plasmon dispersion in strongly coupled charged-particle bilayers in the T = 0 quantum domain. The formulation is based on the classical quasilocalized charge approximation (QLCA) and extends the QLCA formalism into the quantum domain. Its development, which parallels that of the two-dimensional companion paper [Phys. Rev. E 70, 026406 (2004)] by three of the authors, generalizes the single-layer scalar formalism therein to a bilayer matrix formalism. Using pair correlation function data generated from diffusion Monte Carlo simulations, we calculate the dispersion of the in-phase and out-of-phase plasmon modes over a wide range of high- r(s) values and layer separations. The out-of-phase spectrum exhibits an exchange-correlation induced long-wavelength energy gap in contrast to earlier predictions of acoustic dispersion softened by exchange and correlations. The energy gap is similar to what has been previously predicted for classical charged-particle bilayers and subsequently confirmed by recent molecular dynamics computer simulations.
Source PubMed, pmid15903582
Other source [GID 29270] cond-mat/0410575
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