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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: |
22 Oct 2004 | | Subject: | Other | cond-mat.other | | Abstract: | We develop a dielectric matrix and analyze plasmon dispersion in strongly coupled charged-particle bilayers in the quantum domain. The formulation is based on the classical quasi-localized charge approximation (QLCA) and extends the QLCA formalism into the quantum domain. Its development, which parallels that of 2D 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 in-layer coupling values and layer spacings. 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-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: | arXiv, cond-mat/0410575 | | Other source: | [GID 29270] pmid15903582 | | Services: | Forum | Review | PDF | Favorites | |
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