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Article: Valley-contrasting physics in graphene: Magnetic moment and topological transport

TitleValley-contrasting physics in graphene: Magnetic moment and topological transport
Authors
Issue Date2007
PublisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.org
Citation
Physical Review Letters, 2007, v. 99 n. 23 How to Cite?
AbstractWe investigate physical properties that can be used to distinguish the valley degree of freedom in systems where inversion symmetry is broken, using graphene systems as examples. We show that the pseudospin associated with the valley index of carriers has an intrinsic magnetic moment, in close analogy with the Bohr magneton for the electron spin. There is also a valley dependent Berry phase effect that can result in a valley contrasting Hall transport, with carriers in different valleys turning into opposite directions transverse to an in-plane electric field. These effects can be used to generate and detect valley polarization by magnetic and electric means, forming the basis for the valley-based electronics applications. © 2007 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175104
ISSN
2015 Impact Factor: 7.645
2015 SCImago Journal Rankings: 3.731
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXiao, Den_US
dc.contributor.authorYao, Wen_US
dc.contributor.authorNiu, Qen_US
dc.date.accessioned2012-11-26T08:49:13Z-
dc.date.available2012-11-26T08:49:13Z-
dc.date.issued2007en_US
dc.identifier.citationPhysical Review Letters, 2007, v. 99 n. 23en_US
dc.identifier.issn0031-9007en_US
dc.identifier.urihttp://hdl.handle.net/10722/175104-
dc.description.abstractWe investigate physical properties that can be used to distinguish the valley degree of freedom in systems where inversion symmetry is broken, using graphene systems as examples. We show that the pseudospin associated with the valley index of carriers has an intrinsic magnetic moment, in close analogy with the Bohr magneton for the electron spin. There is also a valley dependent Berry phase effect that can result in a valley contrasting Hall transport, with carriers in different valleys turning into opposite directions transverse to an in-plane electric field. These effects can be used to generate and detect valley polarization by magnetic and electric means, forming the basis for the valley-based electronics applications. © 2007 The American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.orgen_US
dc.relation.ispartofPhysical Review Lettersen_US
dc.titleValley-contrasting physics in graphene: Magnetic moment and topological transporten_US
dc.typeArticleen_US
dc.identifier.emailYao, W: wangyao@hku.hken_US
dc.identifier.authorityYao, W=rp00827en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1103/PhysRevLett.99.236809en_US
dc.identifier.pmid18233399-
dc.identifier.scopuseid_2-s2.0-36849027178en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-36849027178&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume99en_US
dc.identifier.issue23en_US
dc.identifier.isiWOS:000251451000055-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridXiao, D=35249533800en_US
dc.identifier.scopusauthoridYao, W=35141935300en_US
dc.identifier.scopusauthoridNiu, Q=7006052653en_US
dc.identifier.citeulike2158958-

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