Isomorph invariance and thermodynamics of repulsive dense bi-Yukawa one-component plasmas

Federico Lucco Castello, Panagiotis Tolias, Jesper Schmidt Hansen, Jeppe Dyre

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

In numerous realizations of complex plasmas, dust-dust interactions are characterized by two screening lengths and are thus better described
by a combination of Yukawa potentials. The present work investigates the static correlations and the thermodynamics of repulsive dense bi-
Yukawa fluids based on the fact that such strongly coupled systems exhibit isomorph invariance. The strong virial-potential energy correlations
are demonstrated with the aid of molecular dynamics simulations, an accurate analytical expression for the isomorph family of curves
is obtained, and an empirical expression for the fluid-solid phase-coexistence line is proposed. The isomorph-based empirically modified
hypernetted-chain approach, grounded on the ansatz of isomorph invariant bridge functions, is then extended to such systems and the
resulting structural properties show an excellent agreement with the results of computer simulations. A simple and accurate closed-form
expression is obtained for the excess internal energy of dense bi-Yukawa fluids by capitalizing on the compact parameterization offered by
the Rosenfeld-Tarazona decomposition in combination with the Rosenfeld scaling, which opens up the energy route to thermodynamics.
OriginalsprogEngelsk
Artikelnummer053705
TidsskriftPhysics of Plasmas
Vol/bind2019
Udgave nummer26
Antal sider11
ISSN1070-664X
DOI
StatusUdgivet - 21 maj 2019

Bibliografisk note

This paper was selected as an Editor’s Pick

Citer dette

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title = "Isomorph invariance and thermodynamics of repulsive dense bi-Yukawa one-component plasmas",
abstract = "In numerous realizations of complex plasmas, dust-dust interactions are characterized by two screening lengths and are thus better describedby a combination of Yukawa potentials. The present work investigates the static correlations and the thermodynamics of repulsive dense bi-Yukawa fluids based on the fact that such strongly coupled systems exhibit isomorph invariance. The strong virial-potential energy correlationsare demonstrated with the aid of molecular dynamics simulations, an accurate analytical expression for the isomorph family of curvesis obtained, and an empirical expression for the fluid-solid phase-coexistence line is proposed. The isomorph-based empirically modifiedhypernetted-chain approach, grounded on the ansatz of isomorph invariant bridge functions, is then extended to such systems and theresulting structural properties show an excellent agreement with the results of computer simulations. A simple and accurate closed-formexpression is obtained for the excess internal energy of dense bi-Yukawa fluids by capitalizing on the compact parameterization offered bythe Rosenfeld-Tarazona decomposition in combination with the Rosenfeld scaling, which opens up the energy route to thermodynamics.",
author = "{Lucco Castello}, Federico and Panagiotis Tolias and Hansen, {Jesper Schmidt} and Jeppe Dyre",
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Isomorph invariance and thermodynamics of repulsive dense bi-Yukawa one-component plasmas. / Lucco Castello, Federico; Tolias, Panagiotis; Hansen, Jesper Schmidt; Dyre, Jeppe.

I: Physics of Plasmas, Bind 2019, Nr. 26, 053705, 21.05.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Isomorph invariance and thermodynamics of repulsive dense bi-Yukawa one-component plasmas

AU - Lucco Castello, Federico

AU - Tolias, Panagiotis

AU - Hansen, Jesper Schmidt

AU - Dyre, Jeppe

N1 - This paper was selected as an Editor’s Pick

PY - 2019/5/21

Y1 - 2019/5/21

N2 - In numerous realizations of complex plasmas, dust-dust interactions are characterized by two screening lengths and are thus better describedby a combination of Yukawa potentials. The present work investigates the static correlations and the thermodynamics of repulsive dense bi-Yukawa fluids based on the fact that such strongly coupled systems exhibit isomorph invariance. The strong virial-potential energy correlationsare demonstrated with the aid of molecular dynamics simulations, an accurate analytical expression for the isomorph family of curvesis obtained, and an empirical expression for the fluid-solid phase-coexistence line is proposed. The isomorph-based empirically modifiedhypernetted-chain approach, grounded on the ansatz of isomorph invariant bridge functions, is then extended to such systems and theresulting structural properties show an excellent agreement with the results of computer simulations. A simple and accurate closed-formexpression is obtained for the excess internal energy of dense bi-Yukawa fluids by capitalizing on the compact parameterization offered bythe Rosenfeld-Tarazona decomposition in combination with the Rosenfeld scaling, which opens up the energy route to thermodynamics.

AB - In numerous realizations of complex plasmas, dust-dust interactions are characterized by two screening lengths and are thus better describedby a combination of Yukawa potentials. The present work investigates the static correlations and the thermodynamics of repulsive dense bi-Yukawa fluids based on the fact that such strongly coupled systems exhibit isomorph invariance. The strong virial-potential energy correlationsare demonstrated with the aid of molecular dynamics simulations, an accurate analytical expression for the isomorph family of curvesis obtained, and an empirical expression for the fluid-solid phase-coexistence line is proposed. The isomorph-based empirically modifiedhypernetted-chain approach, grounded on the ansatz of isomorph invariant bridge functions, is then extended to such systems and theresulting structural properties show an excellent agreement with the results of computer simulations. A simple and accurate closed-formexpression is obtained for the excess internal energy of dense bi-Yukawa fluids by capitalizing on the compact parameterization offered bythe Rosenfeld-Tarazona decomposition in combination with the Rosenfeld scaling, which opens up the energy route to thermodynamics.

UR - http://glass.ruc.dk/pdf/articles/2019_Phys_Plasmas_26_053705.pdf

U2 - 10.1063/1.5100150

DO - 10.1063/1.5100150

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VL - 2019

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 26

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