Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/101886 |
Resumo: | Two coarse-grained models which capture some universal characteristics of stripe forming systems are studied. At high temperatures, the structure factors of both models attain their maxima on a circle in reciprocal space, as a consequence of generic isotropic competing interactions. Although this is known to lead to some universal properties, we show that the phase diagrams have important differences, which are a consequence of the particular k dependence of the fluctuation spectrum in each model. The phase diagrams are computed in a mean field approximation and also after inclusion of small fluctuations, which are shown to modify drastically the mean field behavior. Observables like the modulation length and magnetization profiles are computed for the whole temperature range accessible to both models and some important differences in behavior are observed. A stripe compression modulus is computed, showing an anomalous behavior with temperature as recently reported in related models. Also, a recently proposed scaling hypothesis for modulated systems is tested and found to be valid for both models studied. |
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Mendoza Coto, AlejandroStariolo, Daniel Adrian2014-08-26T09:26:42Z20121539-3755http://hdl.handle.net/10183/101886000869460Two coarse-grained models which capture some universal characteristics of stripe forming systems are studied. At high temperatures, the structure factors of both models attain their maxima on a circle in reciprocal space, as a consequence of generic isotropic competing interactions. Although this is known to lead to some universal properties, we show that the phase diagrams have important differences, which are a consequence of the particular k dependence of the fluctuation spectrum in each model. The phase diagrams are computed in a mean field approximation and also after inclusion of small fluctuations, which are shown to modify drastically the mean field behavior. Observables like the modulation length and magnetization profiles are computed for the whole temperature range accessible to both models and some important differences in behavior are observed. A stripe compression modulus is computed, showing an anomalous behavior with temperature as recently reported in related models. Also, a recently proposed scaling hypothesis for modulated systems is tested and found to be valid for both models studied.application/pdfengPhysical review. E, Statistical, nonlinear, and soft matter physics. Vol. 86, no. 5 (Nov. 2012), 051130, 9 p.CompressibilidadeFlutuaçõesMagnetizaçãoDiagramas de faseCoarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesisEstrangeiroinfo: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:UFRGSORIGINAL000869460.pdf000869460.pdfTexto completo (inglês)application/pdf417158http://www.lume.ufrgs.br/bitstream/10183/101886/1/000869460.pdf09dc0463860b35a5dd62f842e08aee25MD51TEXT000869460.pdf.txt000869460.pdf.txtExtracted Texttext/plain38956http://www.lume.ufrgs.br/bitstream/10183/101886/2/000869460.pdf.txte17bf80a890aa9f1d84a8f3211694597MD52THUMBNAIL000869460.pdf.jpg000869460.pdf.jpgGenerated Thumbnailimage/jpeg2184http://www.lume.ufrgs.br/bitstream/10183/101886/3/000869460.pdf.jpg1bea63a7a8f4036634342a98dfddcd7eMD5310183/1018862018-10-22 09:30:23.817oai:www.lume.ufrgs.br:10183/101886Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-22T12:30:23Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
title |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
spellingShingle |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis Mendoza Coto, Alejandro Compressibilidade Flutuações Magnetização Diagramas de fase |
title_short |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
title_full |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
title_fullStr |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
title_full_unstemmed |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
title_sort |
Coarse-grained models of stripe forming systems : phase diagrams, anomalies, and scaling hypothesis |
author |
Mendoza Coto, Alejandro |
author_facet |
Mendoza Coto, Alejandro Stariolo, Daniel Adrian |
author_role |
author |
author2 |
Stariolo, Daniel Adrian |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Mendoza Coto, Alejandro Stariolo, Daniel Adrian |
dc.subject.por.fl_str_mv |
Compressibilidade Flutuações Magnetização Diagramas de fase |
topic |
Compressibilidade Flutuações Magnetização Diagramas de fase |
description |
Two coarse-grained models which capture some universal characteristics of stripe forming systems are studied. At high temperatures, the structure factors of both models attain their maxima on a circle in reciprocal space, as a consequence of generic isotropic competing interactions. Although this is known to lead to some universal properties, we show that the phase diagrams have important differences, which are a consequence of the particular k dependence of the fluctuation spectrum in each model. The phase diagrams are computed in a mean field approximation and also after inclusion of small fluctuations, which are shown to modify drastically the mean field behavior. Observables like the modulation length and magnetization profiles are computed for the whole temperature range accessible to both models and some important differences in behavior are observed. A stripe compression modulus is computed, showing an anomalous behavior with temperature as recently reported in related models. Also, a recently proposed scaling hypothesis for modulated systems is tested and found to be valid for both models studied. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2014-08-26T09:26:42Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/101886 |
dc.identifier.issn.pt_BR.fl_str_mv |
1539-3755 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000869460 |
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1539-3755 000869460 |
url |
http://hdl.handle.net/10183/101886 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 86, no. 5 (Nov. 2012), 051130, 9 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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