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Nat Commun. 2012 Jan 24;3:635. doi: 10.1038/ncomms1638.

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

Author information

1
Institute of Strength Physics and Materials Science, pr. Academicheskiy 2/4, 634021, Tomsk, Russia. eremeev@ispms.tsc.ru

Abstract

A 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(2)Te(3), Bi(2)Se(3) and Sb(2)Te(3)), with the addition of a third element of the group IV.

PMID:
22273673
DOI:
10.1038/ncomms1638
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