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Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 95, Issue 4, Pages 230–235 (Mi jetpl2447)  

This article is cited in 19 scientific papers (total in 19 papers)


Ab initio study of 2DEG at the surface of topological insulator Bi$_2$Te$_3$

M. G. Vergniorya, T. V. Men'shikovab, S. V. Eremeevbc, E. V. Chulkovad

a Donostia International Physics Center
b Tomsk State University
c Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
d Departamento de Física de Materiales, Facultad de Quimica, UPV/EHU, San Sebastian, Basque Country

Abstract: By means of ab initio DFT-calculation we analyze the mechanism that drives the formation and evolution of the 2D electron gas (2DEG) states at the surface of Bi$_2$Te$_3$ topological insulator (TI). As it has been proved earlier it is due to an expansion of the van der Waals (vdW) spacing produced by intercalation of adsorbates. We will show that the effect of this expansion, in this particular surface, leads to several intriguing phenomena. On one hand we observe a different dispersion of the Dirac cone with respect to the ideal surface and the formation of Parabolic Bands (PB) below the conduction band and $M$-shaped bands in the valence band, the latters have been observed recently in photoemission experiments. On the other hand the expansion of the vdW-gaps changes the symmetry of the orbitals forming the Dirac cone and therefore producing modifications in the local spin texture. The localization of these new 2DEG-states and the relocalization of the Dirac cone will be studied as well.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2012, 95:4, 213–218

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Received: 26.01.2012

Citation: M. G. Vergniory, T. V. Men'shikova, S. V. Eremeev, E. V. Chulkov, “Ab initio study of 2DEG at the surface of topological insulator Bi$_2$Te$_3$”, Pis'ma v Zh. Èksper. Teoret. Fiz., 95:4 (2012), 230–235; JETP Letters, 95:4 (2012), 213–218

Citation in format AMSBIB
\by M.~G.~Vergniory, T.~V.~Men'shikova, S.~V.~Eremeev, E.~V.~Chulkov
\paper Ab initio study of 2DEG at the surface of topological insulator Bi$_2$Te$_3$
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2012
\vol 95
\issue 4
\pages 230--235
\jour JETP Letters
\yr 2012
\vol 95
\issue 4
\pages 213--218

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    12. Choi H., Lee H., Park J., Yu H.-Y., Kim T.G., Shin C., Appl. Phys. Lett., 109:20 (2016), 203505  crossref  isi  scopus
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