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  Chemical Aspects of the Candidate Antiferromagnetic Topological Insulator MnBi2Te4

Zeugner, A., Nietschke, F., Wolter, A. U. B., Gaß, S., Vidal, R. C., Peixoto, T. R. F., et al. (2019). Chemical Aspects of the Candidate Antiferromagnetic Topological Insulator MnBi2Te4. Chemistry of Materials, 31(8), 2795-2806. doi:10.1021/acs.chemmater.8b05017.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-C876-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-C877-6
Genre: Journal Article

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 Creators:
Zeugner, Alexander1, Author
Nietschke, Frederik1, Author
Wolter, Anja U. B.1, Author
Gaß, Sebastian1, Author
Vidal, Raphael C.1, Author
Peixoto, Thiago R. F.1, Author
Pohl, Darius1, Author
Damm, Christine1, Author
Lubk, Axel1, Author
Hentrich, Richard1, Author
Moser, Simon K.1, Author
Fornari, Celso1, Author
Min, Chul Hee1, Author
Schatz, Sonja1, Author
Kißner, Katharina1, Author
Ünzelmann, Maximilian1, Author
Kaiser, Martin1, Author
Scaravaggi, Francesco1, Author
Rellinghaus, Bernd1, Author
Nielsch, Kornelius1, Author
Hess, Christian1, AuthorBüchner, Bernd1, AuthorReinert, Friedrich1, AuthorBentmann, Hendrik1, AuthorOeckler, Oliver1, AuthorDoert, Thomas1, AuthorRuck, Michael2, Author              Isaeva, Anna1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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 Abstract: High-quality single crystals of MnBi 2 Te 4 are grown for the first time by slow cooling within a narrow range between the melting points of Bi 2 Te 3 (586 °C) and MnBi 2 Te 4 (600 °C). Single-crystal X-ray diffraction and electron microscopy reveal ubiquitous antisite defects in both cation sites and, possibly, Mn vacancies (Mn 0.85(3) Bi 2.10(3) Te 4 ). Thermochemical studies complemented with high-temperature X-ray diffraction establish a limited high-temperature range of phase stability and metastability at room temperature. Nevertheless, the synthesis of MnBi 2 Te 4 can be scaled-up as powders can be obtained at subsolidus temperatures and quenched at room temperature. Bulk samples exhibit long-range antiferromagnetic ordering below 24 K. The Mn(II) out-of-plane magnetic state is confirmed by the magnetization, X-ray photoemission, X-ray absorption, and linear dichroism measurements. The compound shows a metallic type of resistivity in the range 4.5-300 K and is an n-type conductor that reaches a thermoelectric figure of merit up to ZT = 0.17. Angle-resolved photoemission experiments show a surface state forming a gapped Dirac cone, thus strengthening MnBi 2 Te 4 as a promising candidate for the intrinsic magnetic topological insulator, in accordance with theoretical predictions. The developed synthetic protocols enable further experimental studies of a crossover between magnetic ordering and nontrivial topology in bulk MnBi 2 Te 4 . © 2019 American Chemical Society.

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Language(s): eng - English
 Dates: 2019-04-022019-04-02
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/acs.chemmater.8b05017
BibTex Citekey: Zeugner20192795
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Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 31 (8) Sequence Number: - Start / End Page: 2795 - 2806 Identifier: ISSN: 0897-4756
CoNE: https://pure.mpg.de/cone/journals/resource/954925561571