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Unified description of sound velocities in strongly coupled Yukawa systems of different spatial dimensionality

Khrapak, Sergey (2019) Unified description of sound velocities in strongly coupled Yukawa systems of different spatial dimensionality. Physics of Plasmas, 26, p. 103703. American Institute of Physics (AIP). DOI: 10.1063/1.5124676 ISSN 1070-664X

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Abstract

Sound velocities in classical single-component fluids with Yukawa (screened Coulomb) interactions are systematically evaluated and analyzed in one-, two-, and three spatial dimensions. In the strongly coupled regime, the convenient sound velocity scale is identified. The sound velocity can be then expressed as a product of this scaling factor and a dimension-dependent function of the screening parameter. A unified approach is used to derive explicit expressions for these dimension-dependent functions in the weakly screened regime. It is also demonstrated that for stronger screening, the effect of spatial dimensionality virtually disappears, the longitudinal sound velocities approach a common asymptote, and a one-dimensional nearest-neighbor approximation provides a relatively good estimate for this asymptote. This result is not specific to the Yukawa potential, but equally applies to other classical systems with steep repulsive interactions. An emerging relation to a popular simple freezing indicator is briefly discussed. Overall, the results can be useful when Yukawa interactions are relevant, in particular, in the context of complex (dusty) plasmas and colloidal suspensions.

Item URL in elib:https://elib.dlr.de/129653/
Document Type:Article
Title:Unified description of sound velocities in strongly coupled Yukawa systems of different spatial dimensionality
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Khrapak, SergeySergey.Khrapak (at) dlr.deUNSPECIFIED
Date:15 October 2019
Journal or Publication Title:Physics of Plasmas
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:26
DOI :10.1063/1.5124676
Page Range:p. 103703
Publisher:American Institute of Physics (AIP)
ISSN:1070-664X
Status:Published
Keywords:complex (dusty) plasma, strongly coupled plasma, elastic properties, sound velocity, dust-acoustic wave
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:18 Oct 2019 11:31
Last Modified:18 Dec 2019 04:20

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