Chemical Aspects of the Candidate Antiferromagnetic Topological Insulator MnBi2Te4
Chemical Aspects of the Candidate Antiferromagnetic Topological Insulator MnBi2Te4
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候选反铁磁拓扑绝缘体 MnBi2Te4 的化学特性
DOI:
10.1021/acs.chemmater.8b05017
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发表时间:
2019
影响因子:
8.6
通讯作者:
C. Hess
中科院分区:
文献类型:
--
作者:
A. Zeugner;F. Nietschke;A.U.B. Wolter;S. Gaß;R.C. Vidal;T.R.F. Peixoto;D. Pohl;C. Damm;A. Lubk;R. Hentrich;S.K. Moser;C. Fornari;C. Hee Min;S. Schatz;K. Kißner;M. Ünzelmann;M. Kaiser;F. Scaravaggi;B. Rellinghaus;K. Nielsch;C. Hess
High-quality single crystals of MnBi2Te4are grown for the first time by slow cooling within a narrow range between the melting points of Bi2Te3(586 °C) and MnBi2Te4(600 °C). Single-crystal X-ray diffraction and electron microscopy reveal ubiquitous antisite defects in both cation sites and, possibly, Mn vacancies (Mn0.85(3)Bi2.10(3)Te4). 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 MnBi2Te4can 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 toZT= 0.17. Angle-resolved photoemission experiments show a surface state forming a gapped Dirac cone, thus strengthening MnBi2Te4as 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 MnBi2Te4.
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影响因子:
8.6
作者:
A. Zeugner;Martin Kaiser;P. Schmidt;T. Menshchikova;I. P. Rusinov;A. Markelov;W. V. D. Broek;E. Chulkov;T. Doert;M. Ruck;A. Isaeva
通讯作者:
A. Zeugner;Martin Kaiser;P. Schmidt;T. Menshchikova;I. P. Rusinov;A. Markelov;W. V. D. Broek;E. Chulkov;T. Doert;M. Ruck;A. Isaeva
影响因子:
8.6
作者:
Henk, J.;Flieger, M.;Chulkov, E. V.
通讯作者:
Chulkov, E. V.
影响因子:
3.3
作者:
SHEVELKOV, AV;DIKAREV, EV;POPOVKIN, BA
通讯作者:
POPOVKIN, BA
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
O. G. Karpinskii;L. E. Shelimova;M. Kretova
通讯作者:
M. Kretova
DOI:
--
发表时间:
1953
期刊:
影响因子:
--
作者:
S. Furberg;E. Boeri;R. Bonnichsen;Jörgine Stene Sörensen;N. A. Sörensen
通讯作者:
N. A. Sörensen