Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.

The dynamic collective properties of the liquid Li0.7-Mg0.3 alloy are studied by molecular-dynamics simulation. The dynamic structure factors and longitudinal current correlations at wave vectors between the hydrodynamic and kinetic regime (0.2,k, 4A 21 ) are analyzed. In order to discuss the influe...

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Detalles Bibliográficos
Autores: Anento Moreno, Napoleón, Padró i Cárdenas, Joan Àngel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2000
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10863
Acceso en línea:https://hdl.handle.net/2445/10863
Access Level:acceso abierto
Palabra clave:Aliatges binaris
Mètodes de simulació
Binary systems (Metallurgy)
Simulation methods
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spelling Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.Anento Moreno, NapoleónPadró i Cárdenas, Joan ÀngelAliatges binarisMètodes de simulacióBinary systems (Metallurgy)Simulation methodsThe dynamic collective properties of the liquid Li0.7-Mg0.3 alloy are studied by molecular-dynamics simulation. The dynamic structure factors and longitudinal current correlations at wave vectors between the hydrodynamic and kinetic regime (0.2,k, 4A 21 ) are analyzed. In order to discuss the influence of the mass difference between particles on the longitudinal modes, the same alloy, except that the mass of the heavy atoms was increased by a factor of 10, was simulated. The resulting properties are compared with those of the ordinary Li0.7-Mg0.3 alloy. It is shown that at wave vectors prior to the hydrodynamic region both fast and slow longitudinal modes of kinetic character propagate through light and heavy particles, respectively. In the hydrodynamic limit fast and slow modes merge into a single acoustic mode. It is corroborated that fast propagating modes in disparate mass liquid mixtures have a kinetic character. The number-number and concentration-concentration time correlation functions were also determined. The former shows a behavior analogous to that of the corresponding function in one-component liquids. The second reflects the existence of propagating concentration modes.The American Physical Society2000info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10863Articles publicats en revistes (Física de la Matèria Condensada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.62.11428Physical Review B, 2000, vol. 62, núm. 17, p. 11428-11436http://doi.org/10.1103/PhysRevB.62.11428(c) The American Physical Society, 2000info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/108632026-05-27T06:46:51Z
dc.title.none.fl_str_mv Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
title Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
spellingShingle Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
Anento Moreno, Napoleón
Aliatges binaris
Mètodes de simulació
Binary systems (Metallurgy)
Simulation methods
title_short Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
title_full Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
title_fullStr Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
title_full_unstemmed Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
title_sort Longitudinal collective modes in simple liquid binary alloys: A computer simulation study.
dc.creator.none.fl_str_mv Anento Moreno, Napoleón
Padró i Cárdenas, Joan Àngel
author Anento Moreno, Napoleón
author_facet Anento Moreno, Napoleón
Padró i Cárdenas, Joan Àngel
author_role author
author2 Padró i Cárdenas, Joan Àngel
author2_role author
dc.subject.none.fl_str_mv Aliatges binaris
Mètodes de simulació
Binary systems (Metallurgy)
Simulation methods
topic Aliatges binaris
Mètodes de simulació
Binary systems (Metallurgy)
Simulation methods
description The dynamic collective properties of the liquid Li0.7-Mg0.3 alloy are studied by molecular-dynamics simulation. The dynamic structure factors and longitudinal current correlations at wave vectors between the hydrodynamic and kinetic regime (0.2,k, 4A 21 ) are analyzed. In order to discuss the influence of the mass difference between particles on the longitudinal modes, the same alloy, except that the mass of the heavy atoms was increased by a factor of 10, was simulated. The resulting properties are compared with those of the ordinary Li0.7-Mg0.3 alloy. It is shown that at wave vectors prior to the hydrodynamic region both fast and slow longitudinal modes of kinetic character propagate through light and heavy particles, respectively. In the hydrodynamic limit fast and slow modes merge into a single acoustic mode. It is corroborated that fast propagating modes in disparate mass liquid mixtures have a kinetic character. The number-number and concentration-concentration time correlation functions were also determined. The former shows a behavior analogous to that of the corresponding function in one-component liquids. The second reflects the existence of propagating concentration modes.
publishDate 2000
dc.date.none.fl_str_mv 2000
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/2445/10863
url https://hdl.handle.net/2445/10863
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/PhysRevB.62.11428
Physical Review B, 2000, vol. 62, núm. 17, p. 11428-11436
http://doi.org/10.1103/PhysRevB.62.11428
dc.rights.none.fl_str_mv (c) The American Physical Society, 2000
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2000
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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 de la Matèria Condensada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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