Spin, charge, and orbital correlations in the one-dimensional t(2g)-orbital Hubbard model

dc.contributor.authorXavier, J. C.
dc.contributor.authorOnishi, H.
dc.contributor.authorHotta, T.
dc.contributor.authorDagotto, E.
dc.contributor.institutionOak Ridge Natl Lab
dc.contributor.institutionUniv Tennessee
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionJapan Atom Energy Res Inst
dc.date.accessioned2014-05-20T15:27:22Z
dc.date.available2014-05-20T15:27:22Z
dc.date.issued2006-01-01
dc.description.abstractWe present the zero-temperature phase diagram of the one-dimensional t(2g)-orbital Hubbard model, obtained using the density-matrix renormalization group and Lanczos techniques. Emphasis is given to the case of the electron density n=5 corresponding to five electrons per site, while several other cases for electron densities between n=3 and 6 are also studied. At n=5, our results indicate a first-order transition between a paramagnetic (PM) insulator phase, with power-law slowly decaying correlations, and a fully polarized ferromagnetic (FM) state by tuning the Hund's coupling. The results also suggest a transition from the n=5 PM insulator phase to a metallic regime by changing the electron density, either via hole or electron doping. The behavior of the spin, charge, and orbital correlation functions in the FM and PM states are also described in the text and discussed. The robustness of these two states against varying parameters suggests that they may be of relevance in quasi-one-dimensional Co-oxide materials, or even in higher dimensional cobaltite systems as well.en
dc.description.affiliationOak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA
dc.description.affiliationUniv Tennessee, Dept Phys, Knoxville, TN 37996 USA
dc.description.affiliationUniv Estadual Paulista, BR-17015970 Bauru, SP, Brazil
dc.description.affiliationJapan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
dc.description.affiliationUnespUniv Estadual Paulista, BR-17015970 Bauru, SP, Brazil
dc.format.extent9
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.73.014405
dc.identifier.citationPhysical Review B. College Pk: American Physical Soc, v. 73, n. 1, 9 p., 2006.
dc.identifier.doi10.1103/PhysRevB.73.014405
dc.identifier.fileWOS000235009000069.pdf
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11449/37365
dc.identifier.wosWOS:000235009000069
dc.language.isoeng
dc.publisherAmerican Physical Soc
dc.relation.ispartofPhysical Review B
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleSpin, charge, and orbital correlations in the one-dimensional t(2g)-orbital Hubbard modelen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmerican Physical Soc
unesp.author.orcid0000-0003-4417-4531[1]

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