Magnetism in spin models for depleted honeycomb-lattice iridates: Spin-glass order towards percolation

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dc.contributor.authorAndrade, Eric C. [UNESP]
dc.contributor.authorVojta, Matthias
dc.contributor.institutionTech Univ Dresden
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-03-18T15:54:45Z
dc.date.available2015-03-18T15:54:45Z
dc.date.issued2014-11-07
dc.description.abstractIridates are characterized by a fascinating interplay of spin-orbit and electron-electron interactions. The honeycomb-lattice materials A(2)IrO(3) (A = Na,Li) have been proposed to realize pseudospin-1/2 Mott insulating states with strongly anisotropic exchange interactions, described by the Heisenberg-Kitaev model, but other scenarios involving longer-range exchange interactions or more delocalized electrons have been put forward as well. Here we study the influence of nonmagnetic doping, i.e., depleted moments, on the magnetic properties of experimentally relevant variants of the Heisenberg-Kitaev and Heisenberg J(1)-J(2)-J(3) models. We generically find that the zigzag order of the clean system is replaced, upon doping, by a spin-glass state with short-ranged zigzag correlations. We determine the spin-glass temperature as a function of the doping level and show that this quantity allows one to assess the importance of longer-range exchange interactions when the doping is driven across the site-percolation threshold of the honeycomb lattice.en
dc.description.affiliationTech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.sponsorshipDFG
dc.description.sponsorshipHelmholtz association
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdDFGFOR 960
dc.description.sponsorshipIdDFGGRK 1621
dc.description.sponsorshipIdHelmholtz associationVI-521
dc.format.extent5
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.90.205112
dc.identifier.citationPhysical Review B. College Pk: Amer Physical Soc, v. 90, n. 20, 5 p., 2014.
dc.identifier.doi10.1103/PhysRevB.90.205112
dc.identifier.fileWOS000345247900002.pdf
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11449/117038
dc.identifier.wosWOS:000345247900002
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review B
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleMagnetism in spin models for depleted honeycomb-lattice iridates: Spin-glass order towards percolationen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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