Strain induced edge magnetism at zigzag edge of a graphene quantum dot

Detalhes bibliográficos
Autor(a) principal: Shuai Cheng
Data de Publicação: 2015
Outros Autores: Jinming Yu, Tianxing Ma, 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/1822/39313
Resumo: We study the temperature dependent magnetic susceptibility of a strained graphene quantum dot by using the determinant quantum Monte Carlo method. Within the Hubbard model on a honeycomb lattice, our unbiased numerical results show that a relative small interaction $U$ may lead to a edge ferromagnetic like behavior in the strained graphene quantum dot, and a possible room temperature transition is suggested. Around half filling, the ferromagnetic fluctuations at the zigzag edge is strengthened both markedly by the on-site Coulomb interaction and the strain, especially in low temperature region. The resultant strongly enhanced ferromagnetic like behavior may be important for the development of many applications.
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spelling Strain induced edge magnetism at zigzag edge of a graphene quantum dotGraphene2D MaterialsCiências Naturais::Ciências FísicasScience & TechnologyWe study the temperature dependent magnetic susceptibility of a strained graphene quantum dot by using the determinant quantum Monte Carlo method. Within the Hubbard model on a honeycomb lattice, our unbiased numerical results show that a relative small interaction $U$ may lead to a edge ferromagnetic like behavior in the strained graphene quantum dot, and a possible room temperature transition is suggested. Around half filling, the ferromagnetic fluctuations at the zigzag edge is strengthened both markedly by the on-site Coulomb interaction and the strain, especially in low temperature region. The resultant strongly enhanced ferromagnetic like behavior may be important for the development of many applications.T.M. thanks CAEP for partial financial support. This work is supported by NSFCs (Grants No. 11374034 and No. 11334012), the Fundamental Research Funds for the Central Universities, and is partially supported by the FEDER COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) through Grant PEstC/FIS/UI0607/2013. We acknowledge support from the EC under Graphene Flagship (Contract No. CNECT-ICT-604391).American Physical SocietyUniversidade do MinhoShuai ChengJinming YuTianxing MaPeres, N. M. R.2015-01-082015-01-08T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/39313eng1098-01211550-235X10.1103/PhysRevB.91.075410info: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:RCAAP2023-07-21T12:47:27Zoai:repositorium.sdum.uminho.pt:1822/39313Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:45:33.699008Repositório 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 Strain induced edge magnetism at zigzag edge of a graphene quantum dot
title Strain induced edge magnetism at zigzag edge of a graphene quantum dot
spellingShingle Strain induced edge magnetism at zigzag edge of a graphene quantum dot
Shuai Cheng
Graphene
2D Materials
Ciências Naturais::Ciências Físicas
Science & Technology
title_short Strain induced edge magnetism at zigzag edge of a graphene quantum dot
title_full Strain induced edge magnetism at zigzag edge of a graphene quantum dot
title_fullStr Strain induced edge magnetism at zigzag edge of a graphene quantum dot
title_full_unstemmed Strain induced edge magnetism at zigzag edge of a graphene quantum dot
title_sort Strain induced edge magnetism at zigzag edge of a graphene quantum dot
author Shuai Cheng
author_facet Shuai Cheng
Jinming Yu
Tianxing Ma
Peres, N. M. R.
author_role author
author2 Jinming Yu
Tianxing Ma
Peres, N. M. R.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Shuai Cheng
Jinming Yu
Tianxing Ma
Peres, N. M. R.
dc.subject.por.fl_str_mv Graphene
2D Materials
Ciências Naturais::Ciências Físicas
Science & Technology
topic Graphene
2D Materials
Ciências Naturais::Ciências Físicas
Science & Technology
description We study the temperature dependent magnetic susceptibility of a strained graphene quantum dot by using the determinant quantum Monte Carlo method. Within the Hubbard model on a honeycomb lattice, our unbiased numerical results show that a relative small interaction $U$ may lead to a edge ferromagnetic like behavior in the strained graphene quantum dot, and a possible room temperature transition is suggested. Around half filling, the ferromagnetic fluctuations at the zigzag edge is strengthened both markedly by the on-site Coulomb interaction and the strain, especially in low temperature region. The resultant strongly enhanced ferromagnetic like behavior may be important for the development of many applications.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-08
2015-01-08T00:00:00Z
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/1822/39313
url http://hdl.handle.net/1822/39313
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1098-0121
1550-235X
10.1103/PhysRevB.91.075410
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 American Physical Society
publisher.none.fl_str_mv American Physical Society
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
repository.mail.fl_str_mv
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