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Article: Valley-dependent optoelectronics from inversion symmetry breaking
Title | Valley-dependent optoelectronics from inversion symmetry breaking |
---|---|
Authors | |
Issue Date | 2008 |
Publisher | American 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, article no. 235406 How to Cite? |
Abstract | Inversion 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 Identifier | http://hdl.handle.net/10722/175140 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yao, W | en_US |
dc.contributor.author | Xiao, D | en_US |
dc.contributor.author | Niu, Q | en_US |
dc.date.accessioned | 2012-11-26T08:49:23Z | - |
dc.date.available | 2012-11-26T08:49:23Z | - |
dc.date.issued | 2008 | en_US |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2008, v. 77 n. 23, article no. 235406 | - |
dc.identifier.issn | 1098-0121 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175140 | - |
dc.description.abstract | Inversion 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.language | eng | en_US |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_US |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.title | Valley-dependent optoelectronics from inversion symmetry breaking | en_US |
dc.type | Article | en_US |
dc.identifier.email | Yao, W: wangyao@hku.hk | en_US |
dc.identifier.authority | Yao, W=rp00827 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1103/PhysRevB.77.235406 | en_US |
dc.identifier.scopus | eid_2-s2.0-44949249735 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-44949249735&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 77 | en_US |
dc.identifier.issue | 23 | en_US |
dc.identifier.spage | article no. 235406 | - |
dc.identifier.epage | article no. 235406 | - |
dc.identifier.isi | WOS:000257289500096 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Yao, W=35141935300 | en_US |
dc.identifier.scopusauthorid | Xiao, D=35249533800 | en_US |
dc.identifier.scopusauthorid | Niu, Q=7006052653 | en_US |
dc.identifier.citeulike | 11172048 | - |
dc.identifier.issnl | 1098-0121 | - |