Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions

Detalhes bibliográficos
Autor(a) principal: Barbosa, Marcia Cristina Bernardes
Data de Publicação: 1992
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/103611
Resumo: We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. In the mean-field approximation the model supports paramagnetic, ferromagnetic, and modulated phases separated by a Lifshitz point. The character of this point is investigated in the presence of fluctuations. Using a standard diagrammatic formalism, we find that the paramodulated phase transition should be fi.rst order and that the Lifshitz point should be a criticai endpoint.
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spelling Barbosa, Marcia Cristina Bernardes2014-09-23T02:12:19Z19920163-1829http://hdl.handle.net/10183/103611000056068We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. In the mean-field approximation the model supports paramagnetic, ferromagnetic, and modulated phases separated by a Lifshitz point. The character of this point is investigated in the presence of fluctuations. Using a standard diagrammatic formalism, we find that the paramodulated phase transition should be fi.rst order and that the Lifshitz point should be a criticai endpoint.application/pdfengPhysical review. B, Condensed matter. New York. Vol. 46, n. 6 (Aug. 1992), p. 3672-3675Física da matéria condensadaTransformações de faseTransformações de faseFluctuation-induced first-order transitions in systems with spatially isotropic competing interactionsEstrangeiroinfo: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:UFRGSORIGINAL000056068.pdf000056068.pdfTexto completo (inglês)application/pdf575127http://www.lume.ufrgs.br/bitstream/10183/103611/1/000056068.pdfbd90283869bd1066ce41a40999135d78MD51TEXT000056068.pdf.txt000056068.pdf.txtExtracted Texttext/plain17904http://www.lume.ufrgs.br/bitstream/10183/103611/2/000056068.pdf.txtff264014fd67470ef048f587f730effbMD52THUMBNAIL000056068.pdf.jpg000056068.pdf.jpgGenerated Thumbnailimage/jpeg2132http://www.lume.ufrgs.br/bitstream/10183/103611/3/000056068.pdf.jpg33cafcff5b52abcc29389ae1ef2202c6MD5310183/1036112024-02-07 05:59:27.923748oai:www.lume.ufrgs.br:10183/103611Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T07:59:27Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
title Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
spellingShingle Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
Barbosa, Marcia Cristina Bernardes
Física da matéria condensada
Transformações de fase
Transformações de fase
title_short Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
title_full Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
title_fullStr Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
title_full_unstemmed Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
title_sort Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions
author Barbosa, Marcia Cristina Bernardes
author_facet Barbosa, Marcia Cristina Bernardes
author_role author
dc.contributor.author.fl_str_mv Barbosa, Marcia Cristina Bernardes
dc.subject.por.fl_str_mv Física da matéria condensada
Transformações de fase
Transformações de fase
topic Física da matéria condensada
Transformações de fase
Transformações de fase
description We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. In the mean-field approximation the model supports paramagnetic, ferromagnetic, and modulated phases separated by a Lifshitz point. The character of this point is investigated in the presence of fluctuations. Using a standard diagrammatic formalism, we find that the paramodulated phase transition should be fi.rst order and that the Lifshitz point should be a criticai endpoint.
publishDate 1992
dc.date.issued.fl_str_mv 1992
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. B, Condensed matter. New York. Vol. 46, n. 6 (Aug. 1992), p. 3672-3675
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