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Collective modes of two-dimensional classical Coulomb fluids

Khrapak, Sergey and Kryuchkov, Nikita and Mistryukova, Lukia and Khrapak, Alexey and Yurchenko, Stanislav (2018) Collective modes of two-dimensional classical Coulomb fluids. Journal of Chemical Physics, 149, p. 134114. American Institute of Physics (AIP). DOI: 10.1063/1.5050708 ISSN 0021-9606

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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.

Item URL in elib:https://elib.dlr.de/122135/
Document Type:Article
Title:Collective modes of two-dimensional classical Coulomb fluids
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Khrapak, SergeyDLR, Sergey.Khrapak (at) dlr.deUNSPECIFIED
Kryuchkov, NikitaBMSTU, Moscow, RussiaUNSPECIFIED
Mistryukova, LukiaBMSTU, Moscow, RussiaUNSPECIFIED
Khrapak, AlexeyRussian Academy of Sciences, khrapak (at) mail.ruUNSPECIFIED
Yurchenko, StanislavBMSTU, Moscow, RussiaUNSPECIFIED
Date:5 October 2018
Journal or Publication Title:Journal of Chemical Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:149
DOI :10.1063/1.5050708
Page Range:p. 134114
Publisher:American Institute of Physics (AIP)
ISSN:0021-9606
Status:Published
Keywords:Coulomb systems, strongly coupled Coulomb systems, one-component plasma, two-dimensional classical systems, collective modes
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Theory, Simulation
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Khrapak, Sergey
Deposited On:10 Oct 2018 16:07
Last Modified:06 Oct 2019 03:00

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