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Atom-specific spin mapping and buried topological states in a homologous series of topological insulators

AuthorsEremeev, S. V.; Menshchikova, Tatiana V.; Koroteev, Yuri M.; Henk, J.; Ernst, A.; Echenique, Pedro M. ; Tsirkin, S. S.; Chulkov, Eugene V.
Issue Date2012
PublisherNature Publishing Group
CitationNature Communications 3: 635 (2012)
AbstractA topological insulator is a state of quantum matter that, while being an insulator in the bulk, hosts topologically protected electronic states at the surface. These states open the opportunity to realize a number of new applications in spintronics and quantum computing. To take advantage of their peculiar properties, topological insulators should be tuned in such a way that ideal and isolated Dirac cones are located within the topological transport regime without any scattering channels. Here we report ab-initio calculations, spin-resolved photoemission and scanning tunnelling microscopy experiments that demonstrate that the conducting states can effectively tuned within the concept of a homologous series that is formed by the binary chalcogenides (Bi 2Te 3, Bi 2Se 3 and Sb 2Te 3), with the addition of a third element of the group IV. © 2012 Macmillan Publishers Limited. All rights reserved.
Identifiersdoi: 10.1038/ncomms1638
issn: 2041-1723
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