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Article: Valley-dependent optoelectronics from inversion symmetry breaking

TitleValley-dependent optoelectronics from inversion symmetry breaking
Authors
Issue Date2008
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 23 How to Cite?
AbstractInversion symmetry breaking allows contrasted circular dichroism in different k -space regions, which takes the extreme form of optical selection rules for interband transitions at high symmetry points. In materials where band edges occur at noncentral valleys, this enables valley-dependent interplay of electrons with light of different circular polarizations, in analogy to spin dependent optical activities in semiconductors. This discovery is in perfect harmony with the previous finding of valley contrasted Bloch band features of orbital magnetic moment and Berry curvatures from inversion symmetry breaking. A universal connection is revealed between the k -resolved optical oscillator strength of interband transitions, the orbital magnetic moment and the Berry curvatures, which also provides a principle for optical measurement of orbital magnetization and intrinsic anomalous Hall conductivity in ferromagnetic systems. The general physics is demonstrated in graphene where inversion symmetry breaking leads to valley contrasted optical selection rule for interband transitions. We discuss graphene based valley optoelectronics applications where light polarization information can be interconverted with electronic information. © 2008 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175140
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYao, Wen_US
dc.contributor.authorXiao, Den_US
dc.contributor.authorNiu, Qen_US
dc.date.accessioned2012-11-26T08:49:23Z-
dc.date.available2012-11-26T08:49:23Z-
dc.date.issued2008en_US
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 23en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttp://hdl.handle.net/10722/175140-
dc.description.abstractInversion symmetry breaking allows contrasted circular dichroism in different k -space regions, which takes the extreme form of optical selection rules for interband transitions at high symmetry points. In materials where band edges occur at noncentral valleys, this enables valley-dependent interplay of electrons with light of different circular polarizations, in analogy to spin dependent optical activities in semiconductors. This discovery is in perfect harmony with the previous finding of valley contrasted Bloch band features of orbital magnetic moment and Berry curvatures from inversion symmetry breaking. A universal connection is revealed between the k -resolved optical oscillator strength of interband transitions, the orbital magnetic moment and the Berry curvatures, which also provides a principle for optical measurement of orbital magnetization and intrinsic anomalous Hall conductivity in ferromagnetic systems. The general physics is demonstrated in graphene where inversion symmetry breaking leads to valley contrasted optical selection rule for interband transitions. We discuss graphene based valley optoelectronics applications where light polarization information can be interconverted with electronic information. © 2008 The American Physical Society.en_US
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 Physicsen_US
dc.titleValley-dependent optoelectronics from inversion symmetry breakingen_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/PhysRevB.77.235406en_US
dc.identifier.scopuseid_2-s2.0-44949249735en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-44949249735&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume77en_US
dc.identifier.issue23en_US
dc.identifier.isiWOS:000257289500096-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridYao, W=35141935300en_US
dc.identifier.scopusauthoridXiao, D=35249533800en_US
dc.identifier.scopusauthoridNiu, Q=7006052653en_US
dc.identifier.citeulike11172048-

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