Two dimensional compass model with Heisenberg interactions

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dc.creatorAntônio Sérgio Teixeira Pires
dc.date.accessioned2023-06-14T13:06:34Z
dc.date.accessioned2025-09-08T23:59:23Z
dc.date.available2023-06-14T13:06:34Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.identifier.doihttps://doi.org/10.1016/j.jmmm.2017.12.098
dc.identifier.issn1873-4766
dc.identifier.urihttps://hdl.handle.net/1843/54915
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Magnetism and Magnetic Materials
dc.rightsAcesso Restrito
dc.subjectAntiferromagnetismo
dc.subject.otherAntiferromagnet
dc.subject.otherCompass model
dc.subject.otherFrustrated systems
dc.titleTwo dimensional compass model with Heisenberg interactions
dc.typeArtigo de periódico
local.citation.epage330
local.citation.spage326
local.citation.volume452
local.description.resumoWe consider a two dimensional compass model with a next and a next near Heisenberg term. The interactions are of two types: frustrated near neighbor compass interactions of amplitudes Jx and Jy, and next and next near neighbor Heisenberg interactions with exchanges J1 and J2 respectively. The Heisenberg interactions are isotropic in spin space, but the compass interactions depend on the bond direction. The ground state of the pure compass model is degenerated with a complex phase diagram. This degeneracy is removed by the Heisenberg terms leading to the arising of a magnetically ordered phase with a preferred direction. We calculate the phase diagrams at zero temperature for the case where, for J2 = 0, we have an antiferromagnetic ground state. We show that varying the value of J2, a magnetically disordered phase can be reached for small values of the compass interactions. We also calculate the critical temperature for a specified value of parameters.
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0304885317320449

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