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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 AuthorsAuthor's ORCID iDORCID Put Code
Khrapak, SergeyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kryuchkov, NikitaBMSTU, Moscow, RussiaUNSPECIFIEDUNSPECIFIED
Mistryukova, LukiaBMSTU, Moscow, RussiaUNSPECIFIEDUNSPECIFIED
Khrapak, AlexeyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yurchenko, StanislavBMSTU, Moscow, RussiaUNSPECIFIEDUNSPECIFIED
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 - Research under Space Conditions
DLR - Research theme (Project):R - Komplexe Plasmen / Theory, Simulation (old)
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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