Vol. 13, no.2, 2021


The anomalous behavior of liquids in three-dimensional and two-dimensional spaces

Yury D. Fomin, Elena N. Tsiok, Valentin N. Ryzhov

L.F. Vereshchagin Institute of High Pressure Physics of Russian Academy of Sciences, http://www.hppi.troitsk.ru/
Moscow 108840, Russian Federation
E-mail: fomin314@mail.ru, ena314@mail.ru, ryzhov@hppi.troitsk.ru
Anton B. Teslyuk
National Research Centre “Kurchatov Institute”, http://www.nrcki.ru/
Moscow 123182, Russian Federation
E-mail: anthony.teslyuk@grid.kiae.ru

Received 24 April, 2021, peer-reviewed 30 April, 2021, accepted 04 May, 2021

Abstract: Using a molecular dynamics method water-like anomalies in a core-softened system depending on the potential parameters and space dimension were investigated. We have examined the anomalies of density, diffusion and structure and have shown that the sequence of anomalous regions cardinally depends on the repulsive step width and space dimension. Thus, in a three-dimensional (3D) system with small values of the step width the sequence of anomalous regions is the same as in water, whereas in a two-dimensional (2D) system – as in liquid silica. With an increase in the step width, an inversion of the regions of the diffusion anomaly and of the density anomaly is observed. Such an unusual sequence of anomalous regions different from water and liquid silica is exclusively caused by the step width and does not depend on the space dimension.

Keywords: water-like anomalies, molecular dynamics method, core-softened potential, repulsive step width, silica

PACS 61.20.Gy, 61.20.Ne, 64.60.Kw

RENSIT, 2021, 13(2):111-118. DOI: 10.17725/rensit.2021.13.111.

Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/386/13(2)111-118e.pdf