title: Thermodynamics of two-dimensional Yukawa systems across coupling regimes.
abstract: Thermodynamics of two-dimensional Yukawa (screened Coulomb or Debye-Hückel) 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.
authors.affiliation: Bauman Moscow State Technical University, 2nd Baumanskaya Str. 5, 105005 Moscow, Russia.
authors.forename: Nikita P
authors.identifier: 0000000290851284
authors.initials: NP
authors.lastname: Kryuchkov
authors.affiliation: CNRS, PIIM, Aix Marseille University, Marseille, France; Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Germany; and Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia.
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Khrapak
authors.affiliation: Bauman Moscow State Technical University, 2nd Baumanskaya Str. 5, 105005 Moscow, Russia.
authors.forename: Stanislav O
authors.identifier: 000000016821904X
authors.initials: SO
authors.lastname: Yurchenko