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Title: Density anomaly in a competing interactions lattice gas model.
Authors: Oliveira, Alan Barros de
Barbosa, Márcia Cristina Bernardes
Issue Date: 2005
Citation: OLIVEIRA, A. B. de; BARBOSA, M. C. B. Density anomaly in a competing interactions lattice gas model. Journal of Physics. Condensed Matter, v. 17, n. 3, p. 399-411, 2005. Disponível em: <>. Acesso em: 01 out. 2012.
Abstract: Water and other tetrahedral liquids are characterized by a density anomaly whose origin is not well understood. A very simple model of a short-range attraction followed by an outer shell repulsion is proposed as a test potential for the density anomaly. We show that these competing interactions when applied to a two-dimensional lattice gas leads to the formation of two liquid phases and to the appearance of a density anomaly. The coexistence line between the two liquid phases meets a critical line between the fluid and the low-density liquid phase at a tricritical point. The line ofmaximum density emerges in the vicinity of the tricritical point, close to the demixing transition.
ISSN: 1361648X
Appears in Collections:DEFIS - Artigos publicados em periódicos

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