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Article: Massive Dirac fermions and spin physics in an ultrathin film of topological insulator

TitleMassive Dirac fermions and spin physics in an ultrathin film of topological insulator
Authors
KeywordsPhysics
Issue Date2010
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2010, v. 81 n. 11 How to Cite?
AbstractWe study transport and optical properties of the surface states, which lie in the bulk energy gap of a thin-film topological insulator. When the film thickness is comparable with the surface-state decay length into the bulk, the tunneling between the top and bottom surfaces opens an energy gap and form two degenerate massive Dirac hyperbolas. Spin-dependent physics emerges in the surface bands, which are vastly different from the bulk behavior. These include the surface spin Hall effects, spin-dependent orbital magnetic moment, and spin-dependent optical transition selection rule, which allows optical spin injection. We show a topological quantum phase transition where the Chern number of the surface bands changes when varying the thickness of the thin film. © 2010 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/123861
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
Funding AgencyGrant Number
Research Grant Council of Hong KongHKU 7037/08P
HKU 10/CRF/08
DoE
NSF
Welch foundationF-1255
Texas Advanced Research Program
Funding Information:

This work was supported by the Research Grant Council of Hong Kong under Grants No. HKU 7037/08P and No. HKU 10/CRF/08. Q.N. was supported in part by DoE, NSF, the Welch foundation F-1255, and the Texas Advanced Research Program.

References

 

DC FieldValueLanguage
dc.contributor.authorLu, HZen_HK
dc.contributor.authorShan, WYen_HK
dc.contributor.authorYao, Wen_HK
dc.contributor.authorNiu, Qen_HK
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2010-10-05T08:18:41Z-
dc.date.available2010-10-05T08:18:41Z-
dc.date.issued2010en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2010, v. 81 n. 11en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/123861-
dc.description.abstractWe study transport and optical properties of the surface states, which lie in the bulk energy gap of a thin-film topological insulator. When the film thickness is comparable with the surface-state decay length into the bulk, the tunneling between the top and bottom surfaces opens an energy gap and form two degenerate massive Dirac hyperbolas. Spin-dependent physics emerges in the surface bands, which are vastly different from the bulk behavior. These include the surface spin Hall effects, spin-dependent orbital magnetic moment, and spin-dependent optical transition selection rule, which allows optical spin injection. We show a topological quantum phase transition where the Chern number of the surface bands changes when varying the thickness of the thin film. © 2010 The American Physical Society.en_HK
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B: Condensed Matter and Materials Physics. Copyright © American Physical Society.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysics-
dc.titleMassive Dirac fermions and spin physics in an ultrathin film of topological insulatoren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=81&issue=11 article no. 115407&spage=&epage=&date=2010&atitle=Massive+Dirac+fermions+and+spin+physics+in+an+ultrathin+film+of+topological+insulator-
dc.identifier.emailLu, HZ: luhz@hku.hken_HK
dc.identifier.emailYao, W: wangyao@hku.hken_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityLu, HZ=rp01599en_HK
dc.identifier.authorityYao, W=rp00827en_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.81.115407en_HK
dc.identifier.scopuseid_2-s2.0-77952348401en_HK
dc.identifier.hkuros174214-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77952348401&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume81en_HK
dc.identifier.issue11en_HK
dc.identifier.eissn1550-235X-
dc.identifier.isiWOS:000276248800120-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLu, HZ=24376662200en_HK
dc.identifier.scopusauthoridShan, WY=36093352700en_HK
dc.identifier.scopusauthoridYao, W=35141935300en_HK
dc.identifier.scopusauthoridNiu, Q=7006052653en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK

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