Journal Article

PreJuSER-16803

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Three- and Two-Dimensional Topogical Insulators in Pb2Sb2Te5, Pb2Bi2Te5, and Pb2Bi2Se5 Layered Compounds

Silkin, I. V. ; Koroteev, Y. M. ; Eremeev, S. V. ; Bihlmayer, G.FZJ* ; Chulkov, E. V.

2011
Springer Heidelberg [u.a.]

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Please use a persistent id in citations: doi:10.1134/S0021364011150112

Abstract: The electronic structure of ternary compounds Pb2Sb2Te5, Pb2Bi2Te5, and Pb2Bi2Se5, which have a layered structure that consists of nine-layer atomic blocks separated by van der Waals gaps, has been theoretically studied. It has been shown that all studied compounds are three-dimensional topological insulators. The possibility of the existence of a two-dimensional topological insulator has been found in ultrathin (0001) Pb2Sb2Te5 and Pb2Bi2Te5 films. Oscillations of the a"currency sign(2) topological invariant with an increase in the film thickness have been observed in the latter compound.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)
2. Quanten-Theorie der Materialien (IAS-1)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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