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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/41509
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dc.creatorBruno Jeferson Lourençopt_BR
dc.creatorRonald Dickmanpt_BR
dc.date.accessioned2022-05-10T17:37:33Z-
dc.date.available2022-05-10T17:37:33Z-
dc.date.issued2016-03-17-
dc.citation.volume2016pt_BR
dc.citation.issue3pt_BR
dc.citation.spage1pt_BR
dc.citation.epage11pt_BR
dc.identifier.doihttps://doi.org/10.1088/1742-5468/2016/03/033107pt_BR
dc.identifier.issn1742-5468pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/41509-
dc.description.resumoWe study the critical properties of the antiferromagnetic spin-1/2 Ising model in an external field on the square lattice. Using tomographicentropic sampling, a flat-histogram simulation method, we estimate the number of configurations, Ω, and related microcanonical averages in the energymagnetizationspace, for system sizes L = 10–30. The critical line and exponents are calculated using finite-size scaling analysis in the temperature-external field plane. With these estimates in hand, we perform detailed studies of critical behavior using Metropolis sampling of larger systems (L ≥ 320). These results are compared to several approximate theoretical methods. Our estimates of critical exponents and Binder’s reduced fourth cumulant along the critical line are in very good agreement with their respective literature values for the twodimensional Ising universality class. We verify as well that the specific heat scales ln L along the critical line, as expected for an Ising-like critical point.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Statistical Mechanics: Theory and Experimentpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectClassical Monte Carlo simulationspt_BR
dc.subjectCritical exponents and amplitudespt_BR
dc.subjectPhase diagramspt_BR
dc.subjectSampling algorithms and rapid mixingpt_BR
dc.subject.otherPhase diagramspt_BR
dc.subject.otherFenômenos Críticospt_BR
dc.subject.otherMétodo de Monte Carlopt_BR
dc.subject.otherIsing modelpt_BR
dc.titlePhase diagram and critical behavior of the antiferromagnetic Ising model in an external fieldpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://doi.org/10.1088/1742-5468/2016/03/033107pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-2378-9393pt_BR
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