Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes

Detalhes bibliográficos
Autor(a) principal: Araújo, M. A. N.
Data de Publicação: 2006
Outros Autores: Peres, N. M. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/4694
Resumo: Within the Hartree Fock- RPA analysis, we derive the spin wave spectrum for the weak ferromagnetic phase of the Hubbard model on the honeycomb lattice. Assuming a uniform magnetization, the polar (optical) and acoustic branches of the spin wave excitations are determined. The bipartite lattice geometry produces a q- dependent phase difference between the spin wave amplitudes on the two sub-lattices. We also find an instability of the uniform weakly magnetized configuration to a weak antiferromagnetic spiraling spin structure, in the lattice plane, with wave vector Q along the
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spelling Weak ferromagnetism and spiral spin structures in honeycomb hubbard planesScience & TechnologyWithin the Hartree Fock- RPA analysis, we derive the spin wave spectrum for the weak ferromagnetic phase of the Hubbard model on the honeycomb lattice. Assuming a uniform magnetization, the polar (optical) and acoustic branches of the spin wave excitations are determined. The bipartite lattice geometry produces a q- dependent phase difference between the spin wave amplitudes on the two sub-lattices. We also find an instability of the uniform weakly magnetized configuration to a weak antiferromagnetic spiraling spin structure, in the lattice plane, with wave vector Q along theFundação para a Ciência e Tecnologia (FCT)AIP PublishingUniversidade do MinhoAraújo, M. A. N.Peres, N. M. R.20062006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/4694eng"Journal of Physics: Condensed Matter". ISSN 0953-8984. 18:5 (2006) 1769-1779.0953-898410.1088/0953-8984/18/5/028http://www.iop.org/EJ/journal/JPhysCMhttp://www.iop.org/EJ/search/0953-8984/1info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:48:38Zoai:repositorium.sdum.uminho.pt:1822/4694Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:46:56.157250Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
title Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
spellingShingle Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
Araújo, M. A. N.
Science & Technology
title_short Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
title_full Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
title_fullStr Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
title_full_unstemmed Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
title_sort Weak ferromagnetism and spiral spin structures in honeycomb hubbard planes
author Araújo, M. A. N.
author_facet Araújo, M. A. N.
Peres, N. M. R.
author_role author
author2 Peres, N. M. R.
author2_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Araújo, M. A. N.
Peres, N. M. R.
dc.subject.por.fl_str_mv Science & Technology
topic Science & Technology
description Within the Hartree Fock- RPA analysis, we derive the spin wave spectrum for the weak ferromagnetic phase of the Hubbard model on the honeycomb lattice. Assuming a uniform magnetization, the polar (optical) and acoustic branches of the spin wave excitations are determined. The bipartite lattice geometry produces a q- dependent phase difference between the spin wave amplitudes on the two sub-lattices. We also find an instability of the uniform weakly magnetized configuration to a weak antiferromagnetic spiraling spin structure, in the lattice plane, with wave vector Q along the
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-01-01T00:00:00Z
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://hdl.handle.net/1822/4694
url http://hdl.handle.net/1822/4694
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Journal of Physics: Condensed Matter". ISSN 0953-8984. 18:5 (2006) 1769-1779.
0953-8984
10.1088/0953-8984/18/5/028
http://www.iop.org/EJ/journal/JPhysCM
http://www.iop.org/EJ/search/0953-8984/1
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv AIP Publishing
publisher.none.fl_str_mv AIP Publishing
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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