Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment

We consider a lattice-gas model of particles with internal orientational degrees of freedom. In addition to antiferromagnetic nearest-neighbor (NN) and next-nearest-neighbor (NNN) positional interactions we also consider NN and NNN interactions arising from the internal state of the particles. The s...

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Detalles Bibliográficos
Autores: Vives i Santa-Eulàlia, Eduard, Planes Vila, Antoni
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1990
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/9527
Acceso en línea:https://hdl.handle.net/2445/9527
Access Level:acceso abierto
Palabra clave:Termodinàmica estadística
Transformacions de fase (Física estadística)
Statistical thermodynamics
Phase transformations (Statistical physics)
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spelling Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatmentVives i Santa-Eulàlia, EduardPlanes Vila, AntoniTermodinàmica estadísticaTransformacions de fase (Física estadística)Statistical thermodynamicsPhase transformations (Statistical physics)We consider a lattice-gas model of particles with internal orientational degrees of freedom. In addition to antiferromagnetic nearest-neighbor (NN) and next-nearest-neighbor (NNN) positional interactions we also consider NN and NNN interactions arising from the internal state of the particles. The system then shows positional and orientational ordering modes with associated phase transitions at Tp and To temperatures at which long-range positional and orientational ordering are, respectively, lost. We use mean-field techniques to obtain a general approach to the study of these systems. By considering particular forms of the orientational interaction function we study coupling effects between both phase transitions arising from the interplay between orientational and positional degrees of freedom. In mean-field approximation coupling effects appear only for the phase transition taking place at lower temperatures. The strength of the coupling depends on the value of the long-range order parameter that remains finite at that temperature.The American Physical Society200920091990info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion9 p.application/pdfhttps://hdl.handle.net/2445/9527Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.41.1885Physical Review A, 1990, vol. 41, núm. 4, p. 1885-1892.http://dx.doi.org/10.1103/PhysRevA.41.1885(c) The American Physical Society, 1990info:eu-repo/semantics/openAccessoai:recercat.cat:2445/95272026-05-29T05:05:01Z
dc.title.none.fl_str_mv Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
title Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
spellingShingle Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
Vives i Santa-Eulàlia, Eduard
Termodinàmica estadística
Transformacions de fase (Física estadística)
Statistical thermodynamics
Phase transformations (Statistical physics)
title_short Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
title_full Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
title_fullStr Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
title_full_unstemmed Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
title_sort Lattice-gas model of particles with orientational and positional degrees of freedom: Mean-field treatment
dc.creator.none.fl_str_mv Vives i Santa-Eulàlia, Eduard
Planes Vila, Antoni
author Vives i Santa-Eulàlia, Eduard
author_facet Vives i Santa-Eulàlia, Eduard
Planes Vila, Antoni
author_role author
author2 Planes Vila, Antoni
author2_role author
dc.subject.none.fl_str_mv Termodinàmica estadística
Transformacions de fase (Física estadística)
Statistical thermodynamics
Phase transformations (Statistical physics)
topic Termodinàmica estadística
Transformacions de fase (Física estadística)
Statistical thermodynamics
Phase transformations (Statistical physics)
description We consider a lattice-gas model of particles with internal orientational degrees of freedom. In addition to antiferromagnetic nearest-neighbor (NN) and next-nearest-neighbor (NNN) positional interactions we also consider NN and NNN interactions arising from the internal state of the particles. The system then shows positional and orientational ordering modes with associated phase transitions at Tp and To temperatures at which long-range positional and orientational ordering are, respectively, lost. We use mean-field techniques to obtain a general approach to the study of these systems. By considering particular forms of the orientational interaction function we study coupling effects between both phase transitions arising from the interplay between orientational and positional degrees of freedom. In mean-field approximation coupling effects appear only for the phase transition taking place at lower temperatures. The strength of the coupling depends on the value of the long-range order parameter that remains finite at that temperature.
publishDate 1990
dc.date.none.fl_str_mv 1990
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/9527
url https://hdl.handle.net/2445/9527
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.41.1885
Physical Review A, 1990, vol. 41, núm. 4, p. 1885-1892.
http://dx.doi.org/10.1103/PhysRevA.41.1885
dc.rights.none.fl_str_mv (c) The American Physical Society, 1990
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 1990
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 9 p.
application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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