Dynamical Structure Functions, Collective Modes, and Energy Gap in Charged-Particle Bilayers

Z. Donkó, G. J. Kalman, P. Hartmann, K. I. Golden, K. Kutasi

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Abstract

The dynamical properties of strongly coupled charged-particle bilayers are investigated by molecular dynamics (MD) simulation and theoretical analysis. The spectra of the current correlation functions show the existence of two (in-phase and out-of-phase) longitudinal and two (in-phase and out-of-phase) transverse collective modes. The out-of-phase modes possess finite frequencies at wave numbers [Formula presented], confirming the existence of the predicted long-wavelength energy gap in the bilayer system. A theoretical model based on an extended Feynman ansatz for the dynamical structure functions provides predictions on the strength of the collective modes that are verified by the MD experiment.

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume90
Issue number22
DOIs
Publication statusPublished - Jan 1 2003

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charged particles
molecular dynamics
predictions
wavelengths
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Dynamical Structure Functions, Collective Modes, and Energy Gap in Charged-Particle Bilayers. / Donkó, Z.; Kalman, G. J.; Hartmann, P.; Golden, K. I.; Kutasi, K.

In: Physical Review Letters, Vol. 90, No. 22, 01.01.2003.

Research output: Contribution to journalArticle

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