Longitudinal collective modes in asymmetric charged-particle bilayers

Hania Mahassen, K. Kutasi, Kenneth I. Golden, Gabor J. Kalman, Z. Donkó

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have analysed the dispersion of longitudinal collective modes in classical asymmetric charged-particle bilayer liquids in the strong coupling regime. The theoretical analysis is based on a dielectric matrix calculated in the quasi-localized charge approximation (QLCA). The matrix elements are expressed as integrals over inter-layer and intra-layer pair correlation function data that we have generated by molecular dynamics (MD) simulations. At the same time, MD simulations of density and current fluctuation spectra were analysed to infer the collective mode dispersion. The long-wavelength finite frequency (energy) gap, brought about by strong inter-layer correlations, is a monotonically increasing function of the density ratio, n2/n 1, and, for the smallest value of the inter-layer spacing considered, the gap reaches its maximum value when the two layer densities are equal. It appears that it stays at that value for n2/n1 > 1.

Original languageEnglish
Pages (from-to)4601-4605
Number of pages5
JournalJournal of Physics A: Mathematical and General
Volume39
Issue number17
DOIs
Publication statusPublished - Apr 28 2006

Fingerprint

Charged particles
Molecular dynamics
charged particles
Computer simulation
Energy gap
Molecular Dynamics Simulation
Wavelength
Current Fluctuations
molecular dynamics
Liquids
Pair Correlation Function
Energy Gap
Increasing Functions
Strong Coupling
matrices
guy wires
Spacing
Theoretical Analysis
simulation
spacing

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

Longitudinal collective modes in asymmetric charged-particle bilayers. / Mahassen, Hania; Kutasi, K.; Golden, Kenneth I.; Kalman, Gabor J.; Donkó, Z.

In: Journal of Physics A: Mathematical and General, Vol. 39, No. 17, 28.04.2006, p. 4601-4605.

Research output: Contribution to journalArticle

Mahassen, Hania ; Kutasi, K. ; Golden, Kenneth I. ; Kalman, Gabor J. ; Donkó, Z. / Longitudinal collective modes in asymmetric charged-particle bilayers. In: Journal of Physics A: Mathematical and General. 2006 ; Vol. 39, No. 17. pp. 4601-4605.
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