Eremeev, Sergey V.Landolt, GabrielMenshchikova, Tatiana V.Slomski, BartoszKoroteev, Yury M.Aliev, Ziya S.Babanly, Mahammad B.Henk, JuergenErnst, ArthurPatthey, LucEich, AndreasKhajetoorians, Alexander AkoHagemeister, JulianPietzsch, OswaldWiebe, JensWiesendanger, RolandEchenique, Pedro M.Tsirkin, Stepan S.Amiraslanov, Imamaddin R.Dil, J. HugoChulkov, Evgueni V.2015-06-232015-06-232015-06-23201210.1038/ncomms1638https://infoscience.epfl.ch/handle/20.500.14299/115359WOS:000299921000033A 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.text::journal::journal article::research article