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Article: Massive Dirac fermions and spin physics in an ultrathin film of topological insulator
Title | Massive Dirac fermions and spin physics in an ultrathin film of topological insulator | ||||||||||||
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Authors | |||||||||||||
Keywords | Physics | ||||||||||||
Issue Date | 2010 | ||||||||||||
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), 2010, v. 81 n. 11, article no. 115407 How to Cite? | ||||||||||||
Abstract | We 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 Identifier | http://hdl.handle.net/10722/123861 | ||||||||||||
ISSN | 2014 Impact Factor: 3.736 | ||||||||||||
ISI Accession Number ID |
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 Field | Value | Language |
---|---|---|
dc.contributor.author | Lu, HZ | en_HK |
dc.contributor.author | Shan, WY | en_HK |
dc.contributor.author | Yao, W | en_HK |
dc.contributor.author | Niu, Q | en_HK |
dc.contributor.author | Shen, SQ | en_HK |
dc.date.accessioned | 2010-10-05T08:18:41Z | - |
dc.date.available | 2010-10-05T08:18:41Z | - |
dc.date.issued | 2010 | en_HK |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2010, v. 81 n. 11, article no. 115407 | - |
dc.identifier.issn | 1098-0121 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/123861 | - |
dc.description.abstract | We 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.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_HK |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.rights | Copyright 2010 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.81.115407 | - |
dc.subject | Physics | - |
dc.title | Massive Dirac fermions and spin physics in an ultrathin film of topological insulator | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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.email | Lu, HZ: luhz@hku.hk | en_HK |
dc.identifier.email | Yao, W: wangyao@hku.hk | en_HK |
dc.identifier.email | Shen, SQ: sshen@hkucc.hku.hk | en_HK |
dc.identifier.authority | Lu, HZ=rp01599 | en_HK |
dc.identifier.authority | Yao, W=rp00827 | en_HK |
dc.identifier.authority | Shen, SQ=rp00775 | en_HK |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevB.81.115407 | en_HK |
dc.identifier.scopus | eid_2-s2.0-77952348401 | en_HK |
dc.identifier.hkuros | 174214 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-77952348401&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 81 | en_HK |
dc.identifier.issue | 11 | en_HK |
dc.identifier.spage | article no. 115407 | - |
dc.identifier.epage | article no. 115407 | - |
dc.identifier.eissn | 1550-235X | - |
dc.identifier.isi | WOS:000276248800120 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Lu, HZ=24376662200 | en_HK |
dc.identifier.scopusauthorid | Shan, WY=36093352700 | en_HK |
dc.identifier.scopusauthorid | Yao, W=35141935300 | en_HK |
dc.identifier.scopusauthorid | Niu, Q=7006052653 | en_HK |
dc.identifier.scopusauthorid | Shen, SQ=7403431266 | en_HK |
dc.identifier.issnl | 1098-0121 | - |