Union Jack and checkerboard lattices with easy plane single ion anisotropy

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dc.creatorAntônio Sérgio Teixeira Pires
dc.date.accessioned2023-06-14T11:57:58Z
dc.date.accessioned2025-09-08T23:01:03Z
dc.date.available2023-06-14T11:57:58Z
dc.date.issued2017
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.identifier.doihttps://doi.org/10.1016/j.jmmm.2017.07.027
dc.identifier.issn1873-4766
dc.identifier.urihttps://hdl.handle.net/1843/54907
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Magnetism and Magnetic Materials
dc.rightsAcesso Restrito
dc.subjectAntiferromagnetismo
dc.subjectTransições de fases
dc.subject.otherAntiferomagnet
dc.subject.otherUnion Jack lattice
dc.subject.otherCheckerboard lattice
dc.subject.otherQuantum phase transition
dc.titleUnion Jack and checkerboard lattices with easy plane single ion anisotropy
dc.typeArtigo de periódico
local.citation.epage440
local.citation.spage435
local.citation.volume442
local.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.
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0304885316334539

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