Waterlike anomalies in a two-dimensional core-softened potential

Detalhes bibliográficos
Autor(a) principal: Bordin, José Rafael
Data de Publicação: 2018
Outros Autores: Barbosa, Marcia Cristina Bernardes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/178152
Resumo: We investigate the structural, thermodynamic, and dynamic behavior of a two-dimensional (2D) core-corona system using Langevin dynamics simulations. The particles are modeled by employing a core-softened potential which exhibits waterlike anomalies in three dimensions. In previous studies in a quasi-2D system a new region in the pressure versus temperature phase diagram of structural anomalies was observed. Here we show that for the two-dimensional case two regions in the pressure versus temperature phase diagram with structural, density, and diffusion anomalies are observed. Our findings indicate that, while the anomalous region at lower densities is due the competition between the two length scales in the potential at higher densities, the anomalous region is related to the reentrance of the melting line.
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spelling Bordin, José RafaelBarbosa, Marcia Cristina Bernardes2018-05-11T02:34:01Z20181539-3755http://hdl.handle.net/10183/178152001063341We investigate the structural, thermodynamic, and dynamic behavior of a two-dimensional (2D) core-corona system using Langevin dynamics simulations. The particles are modeled by employing a core-softened potential which exhibits waterlike anomalies in three dimensions. In previous studies in a quasi-2D system a new region in the pressure versus temperature phase diagram of structural anomalies was observed. Here we show that for the two-dimensional case two regions in the pressure versus temperature phase diagram with structural, density, and diffusion anomalies are observed. Our findings indicate that, while the anomalous region at lower densities is due the competition between the two length scales in the potential at higher densities, the anomalous region is related to the reentrance of the melting line.application/pdfengPhysical review. E, Statistical, nonlinear, and soft matter physics. Melville. Vol. 97, no. 2 (Feb. 2018), 022604, 6 p.Diagramas de faseAnomaliasFluidosWaterlike anomalies in a two-dimensional core-softened potentialEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001063341.pdf001063341.pdfTexto completo (inglês)application/pdf946533http://www.lume.ufrgs.br/bitstream/10183/178152/1/001063341.pdfa591ec33181a2c65db7e6c862179534dMD51TEXT001063341.pdf.txt001063341.pdf.txtExtracted Texttext/plain29573http://www.lume.ufrgs.br/bitstream/10183/178152/2/001063341.pdf.txt712153328bac34f43beef4cff26d2119MD5210183/1781522024-02-07 06:01:23.429305oai:www.lume.ufrgs.br:10183/178152Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:23Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Waterlike anomalies in a two-dimensional core-softened potential
title Waterlike anomalies in a two-dimensional core-softened potential
spellingShingle Waterlike anomalies in a two-dimensional core-softened potential
Bordin, José Rafael
Diagramas de fase
Anomalias
Fluidos
title_short Waterlike anomalies in a two-dimensional core-softened potential
title_full Waterlike anomalies in a two-dimensional core-softened potential
title_fullStr Waterlike anomalies in a two-dimensional core-softened potential
title_full_unstemmed Waterlike anomalies in a two-dimensional core-softened potential
title_sort Waterlike anomalies in a two-dimensional core-softened potential
author Bordin, José Rafael
author_facet Bordin, José Rafael
Barbosa, Marcia Cristina Bernardes
author_role author
author2 Barbosa, Marcia Cristina Bernardes
author2_role author
dc.contributor.author.fl_str_mv Bordin, José Rafael
Barbosa, Marcia Cristina Bernardes
dc.subject.por.fl_str_mv Diagramas de fase
Anomalias
Fluidos
topic Diagramas de fase
Anomalias
Fluidos
description We investigate the structural, thermodynamic, and dynamic behavior of a two-dimensional (2D) core-corona system using Langevin dynamics simulations. The particles are modeled by employing a core-softened potential which exhibits waterlike anomalies in three dimensions. In previous studies in a quasi-2D system a new region in the pressure versus temperature phase diagram of structural anomalies was observed. Here we show that for the two-dimensional case two regions in the pressure versus temperature phase diagram with structural, density, and diffusion anomalies are observed. Our findings indicate that, while the anomalous region at lower densities is due the competition between the two length scales in the potential at higher densities, the anomalous region is related to the reentrance of the melting line.
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-05-11T02:34:01Z
dc.date.issued.fl_str_mv 2018
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. E, Statistical, nonlinear, and soft matter physics. Melville. Vol. 97, no. 2 (Feb. 2018), 022604, 6 p.
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