Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.73.014405 http://hdl.handle.net/11449/219385 |
Resumo: | We present the zero-temperature phase diagram of the one-dimensional t2g -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. © 2006 The American Physical Society. |
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Repositório Institucional da UNESP |
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Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard modelWe present the zero-temperature phase diagram of the one-dimensional t2g -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. © 2006 The American Physical Society.Condensed Matter Sciences Division Oak Ridge National Laboratory, Oak Ridge, TN 37831Department of Physics University of Tennessee, Knoxville, TN 37996Universidade Estadual Paulista, CP 713, 17015-970 Bauru, SPAdvanced Science Research Center Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195Universidade Estadual Paulista, CP 713, 17015-970 Bauru, SPOak Ridge National LaboratoryUniversity of TennesseeUniversidade Estadual Paulista (UNESP)Japan Atomic Energy Research InstituteXavier, J. C. [UNESP]Onishi, H.Hotta, T.Dagotto, E.2022-04-28T18:55:15Z2022-04-28T18:55:15Z2006-02-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevB.73.014405Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 1, 2006.1098-01211550-235Xhttp://hdl.handle.net/11449/21938510.1103/PhysRevB.73.0144052-s2.0-33144476110Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physicsinfo:eu-repo/semantics/openAccess2022-04-28T18:55:15Zoai:repositorio.unesp.br:11449/219385Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T18:55:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
title |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
spellingShingle |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model Xavier, J. C. [UNESP] |
title_short |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
title_full |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
title_fullStr |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
title_full_unstemmed |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
title_sort |
Spin, charge, and orbital correlations in the one-dimensional t2g -orbital Hubbard model |
author |
Xavier, J. C. [UNESP] |
author_facet |
Xavier, J. C. [UNESP] Onishi, H. Hotta, T. Dagotto, E. |
author_role |
author |
author2 |
Onishi, H. Hotta, T. Dagotto, E. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Oak Ridge National Laboratory University of Tennessee Universidade Estadual Paulista (UNESP) Japan Atomic Energy Research Institute |
dc.contributor.author.fl_str_mv |
Xavier, J. C. [UNESP] Onishi, H. Hotta, T. Dagotto, E. |
description |
We present the zero-temperature phase diagram of the one-dimensional t2g -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. © 2006 The American Physical Society. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-02-27 2022-04-28T18:55:15Z 2022-04-28T18:55:15Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevB.73.014405 Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 1, 2006. 1098-0121 1550-235X http://hdl.handle.net/11449/219385 10.1103/PhysRevB.73.014405 2-s2.0-33144476110 |
url |
http://dx.doi.org/10.1103/PhysRevB.73.014405 http://hdl.handle.net/11449/219385 |
identifier_str_mv |
Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 1, 2006. 1098-0121 1550-235X 10.1103/PhysRevB.73.014405 2-s2.0-33144476110 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review B - Condensed Matter and Materials Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1792962253072367616 |