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Sublattice effect on topological surface states in complex (SnTe)n>1(Bi2Te3)m=1 compounds S. V. Eremeev, T. V. Menshchikova, I. V. Silkin [et.al.]

Contributor(s): Eremeev, Sergey V | Silkin, I. V | Vergniory, M. G | Echenique, Pedro Miguel | Chulkov, Evgueni V | Menshchikova, Tatiana VMaterial type: ArticleArticleSubject(s): подрешетки | топологические поверхностные состояния | комплексные соединенияGenre/Form: статьи в журналах Online resources: Click here to access online In: Physical Review B Vol. 91, № 24. P. 245145-1-245145-5Abstract: An exotic type of topological spin-helical surface state was found in layered van der Waals bonded (SnTe)n=2,3(Bi2Te3)m=1 compounds which comprise two covalently bonded band inverted sublattices, SnTe and Bi2Te3, within a building block. This topological state demonstrates unusual dispersion within the band gap. The dispersion of the surface state has two linear sections of different slope with a shoulder feature between them. Such a dispersion of the topological surface state enables an effective switch of the velocity of topological carriers by means of applying an external electric field.
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An exotic type of topological spin-helical surface state was found in layered van der Waals bonded (SnTe)n=2,3(Bi2Te3)m=1 compounds which comprise two covalently bonded band inverted sublattices, SnTe and Bi2Te3, within a building block. This topological state demonstrates unusual dispersion within the band gap. The dispersion of the surface state has two linear sections of different slope with a shoulder feature between them. Such a dispersion of the topological surface state enables an effective switch of the velocity of topological carriers by means of applying an external electric field.

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