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Thermodynamics of two-dimensional Yukawa systems across coupling regimes

Kryuchkov, Nikita and Khrapak, Sergey and Yurchenko, Stanislav (2017) Thermodynamics of two-dimensional Yukawa systems across coupling regimes. Journal of Chemical Physics, 146, p. 134702. American Institute of Physics (AIP). DOI: 10.1063/1.4979325 ISSN 0021-9606

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Official URL: http://dx.doi.org/10.1063/1.4979325

Abstract

Thermodynamics of two-dimensional Yukawa (screened Coulomb or Debye-H¨uckel) systems is studied systematically using molecular dynamics (MD) simulations. Simulations cover very broad parameter range spanning from weakly coupled gaseous states to strongly coupled fluid and crystalline states. Important thermodynamic quantities, such as internal energy and pressure, are obtained and accurate physically motivated fits are proposed. This allows us to put forward simple practical expressions to describe thermodynamic properties of two-dimensional Yukawa systems. For crystals, in addition to numerical simulations, the recently developed shortest-graph interpolation method is applied to describe pair correlations and hence thermodynamic properties. It is shown that the finite-temperature effects can be accounted for by using simple correction of peaks in the pair correlation function. The corresponding correction coefficients are evaluated using MD simulation. The relevance of the obtained results in the context of colloidal systems, complex (dusty) plasmas, and ions absorbed to interfaces in electrolytes is pointed out.

Item URL in elib:https://elib.dlr.de/112303/
Document Type:Article
Title:Thermodynamics of two-dimensional Yukawa systems across coupling regimes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kryuchkov, Nikitabmstu, moscow, russiaUNSPECIFIED
Khrapak, Sergeydlr, sergey.khrapak (at) dlr.deUNSPECIFIED
Yurchenko, Stanislavbmstu, moscow, russiaUNSPECIFIED
Date:3 April 2017
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:146
DOI :10.1063/1.4979325
Page Range:p. 134702
Publisher:American Institute of Physics (AIP)
ISSN:0021-9606
Status:Published
Keywords:two-dimensional (2D) interacting particle systems, Yukawa systems in 2D, thermodynamics of 2D Yukawa systems, soft particles in two dimensions
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
Research Group Complex Plasma > Research Group Complex Plasma
Deposited By: Khrapak, Sergey
Deposited On:15 May 2017 17:09
Last Modified:31 Jul 2019 20:09

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