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  Impact of ordering on the reactivity of mixed crystals of topological insulators with anion substitution: Bi2SeTe2 and Sb2SeTe2

Volykhov, A. A., Frolov, A. S., Neudachina, V. S., Vladimirova, N. V., Gerber, E., Callaert, C., et al. (2021). Impact of ordering on the reactivity of mixed crystals of topological insulators with anion substitution: Bi2SeTe2 and Sb2SeTe2. Applied Surface Science, 541: 148490. doi:10.1016/j.apsusc.2020.148490.

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 Creators:
Volykhov, Andrey A.1, 2, Author
Frolov, Alexander S.1, 3, Author
Neudachina, Vera S.1, Author
Vladimirova, Nadezhda V.1, Author
Gerber, Evgeny1, Author
Callaert, Carolien4, Author
Hadermann, Joke4, Author
Khmelevsky, Nikolay O.5, Author
Knop-Gericke, Axel6, Author           
Sánchez-Barriga, Jaime7, Author
Yashina, Lada V.1, 3, Author
Affiliations:
1Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia, ou_persistent22              
2Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky Avenue 31, 119991 Moscow, Russia, ou_persistent22              
3N.N. Semenov Federal Research Center for Chemical Physics, Kosygina Street 4, 119991 Moscow, Russia, ou_persistent22              
4EMAT, Department of Physics, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium, ou_persistent22              
5Moscow State University of Technology ‘‘STANKIN’’, Vadkovsky side-street 1, 127994 Moscow, Russia, ou_persistent22              
6Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
7Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, D-12489 Berlin, Germany, ou_persistent22              

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 Abstract: Three-dimensional topological insulators are exotic materials with unique properties. Tetradymite type binary chalcogenides of bismuth and antimony, as well as their mixed crystals, belong to prototypical TIs. Potential device applications of these materials require in-depth knowledge of their stability in the ambient atmosphere and other media maintained during their processing. Here we investigated the reactivity of mixed crystals with anion substitution, Bi2(Se1-xTex)3 and Sb2(Se1-xTex)3, towards molecular oxygen using both in situ and ex situ X-ray photoelectron spectroscopy. The results indicate that, in contrast to cation substitution, partial substitution of tellurium by selenium atoms leads to anomalously high surface reactivity, which even exceeds that of the most reactive binary constituent. We attribute this effect to anion ordering that essentially modifies the bond geometry, especially the respective bond angles as modeled by DFT.

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Language(s): eng - English
 Dates: 2020-06-282020-11-132020-11-182021-03-01
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apsusc.2020.148490
 Degree: -

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Title: Applied Surface Science
  Abbreviation : Appl. Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 541 Sequence Number: 148490 Start / End Page: - Identifier: ISSN: 0169-4332
CoNE: https://pure.mpg.de/cone/journals/resource/954928576736