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

作者：Eremeev Sergey V^*; Landolt Gabriel; Menshchikova Tatiana V; Slomski Bartosz; Koroteev Yury M; Aliev Ziya S; Babanly Mahammad B; Henk Juergen; Ernst Arthur; Patthey Luc; Eich Andreas; Khajetoorians Alexander Ako; Hagemeister Julian; Pietzsch Oswald; Wiebe Jens; Wiesendanger Roland; Echenique Pedro M; Tsirkin Stepan S; Amiraslanov Imamaddin R; Dil J Hugo; Chulkov Evgueni V

来源：Nature Communications, 2012, 3(1): 635.

DOI：10.1038/ncomms1638

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 (Bi2Te3, Bi2Se3 and Sb2Te3), with the addition of a third element of the group IV.

• 出版日期2012-1