Effect of dust–dust interaction type on normal modes of two-dimensional dust crystals

Dispersion relations for longitudinal and transverse dust lattice waves in two-dimensional hexagonal dust crystals of negatively charged particles were investigated and compared for two different interaction types, namely, Coulomb and screened Yukawa potentials. Results showed that the interaction t...

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Bibliographic Details
Published in:Journal of plasma physics 2014-10, Vol.80 (5), p.687-696
Main Authors: Bekda, A., Djebli, M.
Format: Article
Language:English
Subjects:
Coulomb friction
Crystals
Dispersions
Dust
Lattices
Plasma physics
Screening
Two dimensional
Wave propagation
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Summary:Dispersion relations for longitudinal and transverse dust lattice waves in two-dimensional hexagonal dust crystals of negatively charged particles were investigated and compared for two different interaction types, namely, Coulomb and screened Yukawa potentials. Results showed that the interaction type and the wave propagation direction change the characteristics of the dispersion relation as well as the group velocity. The screening parameter is also found to reduce the mode frequencies.
ISSN:0022-3778
1469-7807
DOI:10.1017/S0022377814000233