DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Dohun | ko |
dc.contributor.author | Cho, Sungjae | ko |
dc.contributor.author | Butch, Nicholas P. | ko |
dc.contributor.author | Syers, Paul | ko |
dc.contributor.author | Kirshenbaum, Kevin | ko |
dc.contributor.author | Adam, Shaffique | ko |
dc.contributor.author | Paglione, Johnpierre | ko |
dc.contributor.author | Fuhrer, Michael S. | ko |
dc.date.accessioned | 2015-11-20T10:23:34Z | - |
dc.date.available | 2015-11-20T10:23:34Z | - |
dc.date.created | 2014-08-04 | - |
dc.date.created | 2014-08-04 | - |
dc.date.created | 2014-08-04 | - |
dc.date.created | 2014-08-04 | - |
dc.date.issued | 2012-06 | - |
dc.identifier.citation | NATURE PHYSICS, v.8, no.6, pp.459 - 463 | - |
dc.identifier.issn | 1745-2473 | - |
dc.identifier.uri | http://hdl.handle.net/10203/201384 | - |
dc.description.abstract | The newly discovered three-dimensional strong topological insulators (STIs) exhibit topologically protected Dirac surface states(1,2). Although the STI surface state has been studied spectroscopically, for example, by photoemission(3-5) and scanned probes(6-10), transport experiments(11-17) have failed to demonstrate the most fundamental signature of the STI: ambipolar metallic electronic transport in the topological surface of an insulating bulk. Here we show that the surfaces of thin (similar to 10 nm), low-doped Bi2Se3 (approximate to 10(17) cm(-3)) crystals are strongly electrostatically coupled, and a gate electrode can completely remove bulk charge carriers and bring both surfaces through the Dirac point simultaneously. We observe clear surface band conduction with a linear Hall resistivity and a well-defined ambipolar field effect, as well as a charge-inhomogeneous minimum conductivity region(18-20). A theory of charge disorder in a Dirac band(19-21) explains well both the magnitude and the variation with disorder strength of the minimum conductivity (2 to 5 e(2)/h per surface) and the residual (puddle) carrier density (0.4 x 10(12) to 4 x 10(12) cm(-2)). From the measured carrier mobilities 320-1,500 cm(2) V-1 s(-1), the charged impurity densities 0.5 x 10(13) to 2.3 x 10(13) cm(-2) are inferred. They are of a similar magnitude to the measured doping levels at zero gate voltage (1 x 10(13) to 3 x 10(13) cm(-2)), identifying dopants as the charged impurities. | - |
dc.language | English | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.title | Surface conduction of topological Dirac electrons in bulk insulating Bi2Se3 | - |
dc.type | Article | - |
dc.identifier.wosid | 000304667500011 | - |
dc.identifier.scopusid | 2-s2.0-84861669610 | - |
dc.type.rims | ART | - |
dc.citation.volume | 8 | - |
dc.citation.issue | 6 | - |
dc.citation.beginningpage | 459 | - |
dc.citation.endingpage | 463 | - |
dc.citation.publicationname | NATURE PHYSICS | - |
dc.identifier.doi | 10.1038/NPHYS2286 | - |
dc.contributor.localauthor | Cho, Sungjae | - |
dc.contributor.nonIdAuthor | Kim, Dohun | - |
dc.contributor.nonIdAuthor | Butch, Nicholas P. | - |
dc.contributor.nonIdAuthor | Syers, Paul | - |
dc.contributor.nonIdAuthor | Kirshenbaum, Kevin | - |
dc.contributor.nonIdAuthor | Adam, Shaffique | - |
dc.contributor.nonIdAuthor | Paglione, Johnpierre | - |
dc.contributor.nonIdAuthor | Fuhrer, Michael S. | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | GRAPHENE | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | BI2TE3 | - |
dc.subject.keywordPlus | NANORIBBONS | - |
dc.subject.keywordPlus | TRANSISTOR | - |
dc.subject.keywordPlus | SCATTERING | - |
dc.subject.keywordPlus | FERMIONS | - |
dc.subject.keywordPlus | STATES | - |
dc.subject.keywordPlus | CONE | - |
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