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Collective modes of two-dimensional classical Coulomb fluids.
- Source :
- Journal of Chemical Physics; 10/5/2018, Vol. 149 Issue 13, pN.PAG-N.PAG, 8p, 6 Graphs
- Publication Year :
- 2018
-
Abstract
- Molecular dynamics simulations have been performed to investigate in detail collective modes spectra of two-dimensional Coulomb fluids in a wide range of coupling. The obtained dispersion relations are compared with theoretical approaches based on quasi-crystalline approximation, also known as the quasi-localized charge approximation, in the plasma-related context. An overall satisfactory agreement between theory and simulations is documented for the longitudinal mode at moderate coupling and in the long-wavelength domain at strong coupling. For the transverse mode, satisfactory agreement in the long-wavelength domain is only reached at very strong coupling, when the cutoff wave-number below which shear waves cannot propagate becomes small. The dependence of the cutoff wave-number for shear waves on the coupling parameter is obtained. [ABSTRACT FROM AUTHOR]
- Subjects :
- CRYSTAL structure
MOLECULAR dynamics
SHEAR waves
APPROXIMATION theory
WAVELENGTHS
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 149
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 132184770
- Full Text :
- https://doi.org/10.1063/1.5050708