Abstract:
The specific features of the electronic and spin structures of a triple topological insulator Bi2Te2.4Se0.6 which is characterized by high-efficiency thermoelectric properties, have been studied with the use of angular- and spin-resolved photoelectron spectroscopy and compared with theoretical calculations in the framework of the density functional theory. It has been shown that the Fermi level for Bi2Te2.4Se0.6 falls outside the band gap and traverses the topological surface state (the Dirac cone). Theoretical calculations of the electronic structure of the surface have demonstrated that the character of distribution of Se atoms on the Te–Se sublattice practically does not influence the dispersion of the surface topological electronic state. The spin structure of this state is characterized by helical spin polarization. Analysis of the Bi2Te2.4Se0.6 surface by scanning tunnel microscopy has revealed atomic smoothness of the surface of a sample cleaved in an ultrahigh vacuum, with a lattice constant of ∼4.23 ˚A. Stability of the Dirac cone of the Bi2Te2.4Se0.6 compound to deposition of a Pt monolayer on the surface is shown.
Citation:
I. I. Klimovskikh, M. V. Filianina, S. V. Eremeev, A. A. Rybkina, A. G. Rybkin, E. V. Zhizhin, A. E. Petukhov, I. P. Rusinov, K. A. Kokh, E. V. Chulkov, O. E. Tereshchenko, A. M. Shikin, “Specific features of the electronic, spin, and atomic structures of a topological insulator Bi2Te2.4Se0.6”, Fizika Tverdogo Tela, 58:4 (2016), 754–762; Phys. Solid State, 58:4 (2016), 779–787
\Bibitem{KliFilEre16}
\by I.~I.~Klimovskikh, M.~V.~Filianina, S.~V.~Eremeev, A.~A.~Rybkina, A.~G.~Rybkin, E.~V.~Zhizhin, A.~E.~Petukhov, I.~P.~Rusinov, K.~A.~Kokh, E.~V.~Chulkov, O.~E.~Tereshchenko, A.~M.~Shikin
\paper Specific features of the electronic, spin, and atomic structures of a topological insulator Bi$_{2}$Te$_{2.4}$Se$_{0.6}$
\jour Fizika Tverdogo Tela
\yr 2016
\vol 58
\issue 4
\pages 754--762
\mathnet{http://mi.mathnet.ru/ftt10023}
\elib{https://elibrary.ru/item.asp?id=25669023}
\transl
\jour Phys. Solid State
\yr 2016
\vol 58
\issue 4
\pages 779--787
\crossref{https://doi.org/10.1134/S1063783416040065}
Linking options:
https://www.mathnet.ru/eng/ftt10023
https://www.mathnet.ru/eng/ftt/v58/i4/p754
This publication is cited in the following 5 articles:
S. O. Filnov, Yu. A. Surnin, A. V. Koroleva, I. I. Klimovskikh, D. A. Estyunin, A. Yu. Varykhalov, K. A. Bokai, K. A. Kokh, O. E. Tereshchenko, V. A. Golyashov, E. V. Shevchenko, A. M. Shikin, “Magnetic and Electronic Properties of Gd-Doped Topological Insulator Bi1.09Gd0.06Sb0.85Te3”, J. Exp. Theor. Phys., 129:3 (2019), 404
M.V. Filianina, I.I. Klimovskikh, I.A. Shvets, A.G. Rybkin, A.E. Petukhov, E.V. Chulkov, V.A. Golyashov, K.A. Kokh, O.E. Tereshchenko, C. Polley, T. Balasubramanian, M. Leandersson, A.M. Shikin, “Spin and electronic structure of the topological insulator Bi1.5Sb0.5Te1.8Se1.2”, Materials Chemistry and Physics, 207 (2018), 253
Yu. A. Surnin, I. I. Klimovskikh, D. M. Sostina, K. A. Kokh, O. E. Tereshchenko, A. M. Shikin, “Impact of Ultrathin Pb Films on the Topological Surface and Quantum-Well States of Bi2Se3 and Sb2Te3 Topological Insulators”, J. Exp. Theor. Phys., 126:4 (2018), 535
I. I. Klimovskikh, D. Sostina, A. Petukhov, A. G. Rybkin, S. V. Eremeev, E. V. Chulkov, O. E. Tereshchenko, K. A. Kokh, A. M. Shikin, “Spin-resolved band structure of heterojunction Bi-bilayer/3D topological insulator in the quantum dimension regime in annealed Bi2Te2.4Se0.6”, Sci Rep, 7:1 (2017)
V. Ya. Kogai, K. G. Mikheev, G. M. Mikheev, “Deposition of stoichiometric Bi2Se3 film by vacuum-thermal treatment of Se/Bi heterostructure”, Tech. Phys. Lett., 43:8 (2017), 701–704