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Article: Spin-polarized and valley helical edge modes in graphene nanoribbons

TitleSpin-polarized and valley helical edge modes in graphene nanoribbons
Authors
Issue Date2011
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2011, v. 84 n. 3, article no. 035431, p. 035431-1-035431-6 How to Cite?
AbstractWe investigate the electronic properties of zigzag-terminated graphene nanoribbons in the presence of a staggered sublattice potential. We show that due to the edge ferromagnetism, spin-polarized dispersive edge modes with well-defined valley indices can appear inside the bulk band gap opened by the inversion symmetry breaking. These edge modes are helical with respect to their valley indices, hence are robust against scattering from smooth disorder potentials. We further propose a concrete system with a zigzag graphene nanoribbon grown on top of a hexagonal boron-nitride substrate to realize such edge modes. These edge states could be utilized as perfect spin filters or analyzers in spintronics applications. © 2011 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/139649
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
Funding AgencyGrant Number
NSFDMR0906025
Welch FoundationF-1255
DOE, (Division of Materials Science and Engineering)DE-FG03-02ER45958
NSF of China10974231
MOST of China2007CB925000
2011CBA00100
Funding Information:

Z.Q. was supported by NSF (Grant No. DMR0906025) and Welch Foundation (Grant No. F-1255). Q.N. was supported by DOE (Grant No. DE-FG03-02ER45958, Division of Materials Science and Engineering) and Texas Advanced Research Program. Y.Y. was supported by NSF of China (Grant No. 10974231) and the MOST Project of China (Grants No. 2007CB925000 and No. 2011CBA00100).

 

DC FieldValueLanguage
dc.contributor.authorQiao, ZHen_US
dc.contributor.authorYang, SYAen_US
dc.contributor.authorWang, Ben_US
dc.contributor.authorYao, YGen_US
dc.contributor.authorNiu, Qen_US
dc.date.accessioned2011-09-23T05:52:55Z-
dc.date.available2011-09-23T05:52:55Z-
dc.date.issued2011en_US
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2011, v. 84 n. 3, article no. 035431, p. 035431-1-035431-6en_US
dc.identifier.issn1098-0121-
dc.identifier.urihttp://hdl.handle.net/10722/139649-
dc.description.abstractWe investigate the electronic properties of zigzag-terminated graphene nanoribbons in the presence of a staggered sublattice potential. We show that due to the edge ferromagnetism, spin-polarized dispersive edge modes with well-defined valley indices can appear inside the bulk band gap opened by the inversion symmetry breaking. These edge modes are helical with respect to their valley indices, hence are robust against scattering from smooth disorder potentials. We further propose a concrete system with a zigzag graphene nanoribbon grown on top of a hexagonal boron-nitride substrate to realize such edge modes. These edge states could be utilized as perfect spin filters or analyzers in spintronics applications. © 2011 American Physical Society.-
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_US
dc.relation.ispartofPhysical Review B (Condensed Matter and Materials Physics)en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.-
dc.titleSpin-polarized and valley helical edge modes in graphene nanoribbonsen_US
dc.typeArticleen_US
dc.identifier.emailWang, B: benwb@hku.hken_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.84.035431-
dc.identifier.scopuseid_2-s2.0-79961214367-
dc.identifier.hkuros195622en_US
dc.identifier.volume84en_US
dc.identifier.issue3-
dc.identifier.spage035431-1en_US
dc.identifier.epage035431-6en_US
dc.identifier.isiWOS:000293128900022-
dc.publisher.placeUnited States-

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