Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization

Detalhes bibliográficos
Autor(a) principal: Barbosa, Marcia Cristina Bernardes
Data de Publicação: 1993
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/101396
Resumo: We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. On the basis of an e expansion, we demonstrate that for small values of the external field H, the paramagnetic-to-modulated-phase transition remains first order. For larger fields, such a transition changes to a continuous one at a tricritical point ~ As one varies the wave vector q that is related to the modulated phase, one finds a line of such tricritical points. We remark that such a line must end at a Lifshitz tricritical point at qc = 0.
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spelling Barbosa, Marcia Cristina Bernardes2014-08-19T02:10:45Z19931063-651Xhttp://hdl.handle.net/10183/101396000056648We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. On the basis of an e expansion, we demonstrate that for small values of the external field H, the paramagnetic-to-modulated-phase transition remains first order. For larger fields, such a transition changes to a continuous one at a tricritical point ~ As one varies the wave vector q that is related to the modulated phase, one finds a line of such tricritical points. We remark that such a line must end at a Lifshitz tricritical point at qc = 0.application/pdfengPhysical Review. E, Statistical Physics, Plasmas, Fluids and Related Interdisciplinary Topics. New York. Vol. 48, no. 3 (Sept. 1993), p. 1744-1751Física estatísticaMecânica estatísticaIsing model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realizationEstrangeiroinfo: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:UFRGSORIGINAL000056648.pdf000056648.pdfTexto completo (inglês)application/pdf312059http://www.lume.ufrgs.br/bitstream/10183/101396/1/000056648.pdf66093723c6fb07a5ac4fbbe43efc5a8cMD51TEXT000056648.pdf.txt000056648.pdf.txtExtracted Texttext/plain27399http://www.lume.ufrgs.br/bitstream/10183/101396/2/000056648.pdf.txt0aebaf7485bffa9e3af2aa7961eb45f9MD52THUMBNAIL000056648.pdf.jpg000056648.pdf.jpgGenerated Thumbnailimage/jpeg1866http://www.lume.ufrgs.br/bitstream/10183/101396/3/000056648.pdf.jpgfbfff7a0e47fe42e7f682a905040bdf8MD5310183/1013962024-02-07 06:01:17.935108oai:www.lume.ufrgs.br:10183/101396Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:17Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
title Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
spellingShingle Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
Barbosa, Marcia Cristina Bernardes
Física estatística
Mecânica estatística
title_short Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
title_full Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
title_fullStr Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
title_full_unstemmed Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
title_sort Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
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 estatística
Mecânica estatística
topic Física estatística
Mecânica estatística
description We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. On the basis of an e expansion, we demonstrate that for small values of the external field H, the paramagnetic-to-modulated-phase transition remains first order. For larger fields, such a transition changes to a continuous one at a tricritical point ~ As one varies the wave vector q that is related to the modulated phase, one finds a line of such tricritical points. We remark that such a line must end at a Lifshitz tricritical point at qc = 0.
publishDate 1993
dc.date.issued.fl_str_mv 1993
dc.date.accessioned.fl_str_mv 2014-08-19T02:10:45Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/101396
dc.identifier.issn.pt_BR.fl_str_mv 1063-651X
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physical Review. E, Statistical Physics, Plasmas, Fluids and Related Interdisciplinary Topics. New York. Vol. 48, no. 3 (Sept. 1993), p. 1744-1751
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