Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 149, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5050708
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Funding
- Russian Science Foundation [17-19-01691]
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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. Published by AIP Publishing.
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