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Buried topological states in a homological series of topological insulators

Autor Chulkov, Eugene V. ; Eremeev, S. V.; Menshchikova, T. V.; Vergniory, M.; Koroteev, Yuri M.
Fecha de publicación 2012
Citación CECAM Workshop (2012)
ResumenA topological insulator (TI) is a novel state of quantum matter that, while being an insulator in the bulk, hold topologically protected electronic states at the surface. The existence of these states opens the opportunity to realize a number of new applications in spintronics and quantum computing [1]. To utilize 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. On the basis of ab-initio calculations we demonstrate here that the necessary tuning of the conducting states can be effectively realized within the concept of a homological series that is formed by the binary chalcogenides (Bi2Te3, Bi2Se3, and Sb2Te3), with the addition of a third element of the group IV [2,3]. We show that these compounds can host exotic buried topological states strongly protected against surface perturbations.
Descripción Trabajo presentado al CECAM Workshop on "Topological Insulators and Non-Perturbative Spin-Orbit Coupling" celebrado en Lausanne (Suiza) del 9 al 11 de Enero de 2012.
URI http://hdl.handle.net/10261/103186
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