DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Thermodynamics and dynamics of two-dimensional systems with dipole-like repulsive interactions

Khrapak, Sergey and Kryuchkov, Nikita and Yurchenko, Stanislav (2018) Thermodynamics and dynamics of two-dimensional systems with dipole-like repulsive interactions. Physical Review E, 97 (2), 022616. American Physical Society. doi: 10.1103/PhysRevE.97.022616. ISSN 2470-0045.

[img] PDF


Thermodynamics and dynamics of a classical two-dimensional system with dipolelike isotropic repulsive interactions are studied systematically using extensive molecular dynamics (MD) simulations supplemented by appropriate theoretical approximations. This interaction potential, which decays as an inverse cube of the interparticle distance, belongs to the class of very soft long-ranged interactions. As a result, the investigated system exhibits certain universal properties that are also shared by other related soft-interacting particle systems (like, for instance, the one-component plasma and weakly screened Coulomb systems). These universalities are explored in this article to construct a simple and reliable description of the system thermodynamics. In particular, Helmholtz free energies of the fluid and solid phases are derived, from which the location of the fluid-solid coexistence is determined. The quasicrystalline approximation is applied to the description of collective modes in dipole fluids. Its simplification, previously validated on strongly coupled plasma fluids, is used to derive explicit analytic dispersion relations for the longitudinal and transverse wave modes, which compare satisfactory with those obtained from direct MD simulations in the long-wavelength regime. Sound velocities of the dipole fluids and solids are derived and analyzed.

Item URL in elib:https://elib.dlr.de/119382/
Document Type:Article
Title:Thermodynamics and dynamics of two-dimensional systems with dipole-like repulsive interactions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Yurchenko, StanislavBMSTU, Moscow, RussiaUNSPECIFIEDUNSPECIFIED
Date:28 February 2018
Journal or Publication Title:Physical Review E
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:022616
Publisher:American Physical Society
Keywords:two-dimensional (2D) systems, soft interacting particles in two-dimensions, thermodynamics, phase transitions, 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:19 Mar 2018 08:00
Last Modified:17 Mar 2021 13:40

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.