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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/54907
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dc.creatorAntônio Sérgio Teixeira Pirespt_BR
dc.date.accessioned2023-06-14T11:57:58Z-
dc.date.available2023-06-14T11:57:58Z-
dc.date.issued2017-
dc.citation.volume442pt_BR
dc.citation.spage435pt_BR
dc.citation.epage440pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jmmm.2017.07.027pt_BR
dc.identifier.issn1873-4766pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/54907-
dc.description.resumoThe zero-temperature phase diagrams of the antiferromagnetic Union Jack and checkerboard lattices, with spin one and an easy-plane single anisotropy term, are studied using the SU(3) Schwinger boson formalism (also known as flavor wave theory). We find that the Union Jack lattice has a quantum phase transition (QPT) at J2/J1 = 0.707 between a Néel and a collinear phase, while the checkerboard lattice has a QPT at J2/J1 = 0.785, from the Néel to a magnetically disordered phase. The ground state phase diagrams of the two models are different, both from each other and from that of the square lattice antiferromagnet with all the next nearest neighbors. For the checkerboard lattice, we calculate the spin gap and the ground state energy in the disordered phase. This phase is a candidate for a spin liquid state.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_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 Magnetism and Magnetic Materials-
dc.rightsAcesso Restritopt_BR
dc.subjectAntiferomagnetpt_BR
dc.subjectUnion Jack latticept_BR
dc.subjectCheckerboard latticept_BR
dc.subjectQuantum phase transitionpt_BR
dc.subject.otherAntiferromagnetismopt_BR
dc.subject.otherTransições de fasespt_BR
dc.titleUnion Jack and checkerboard lattices with easy plane single ion anisotropypt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0304885316334539pt_BR
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