Study of the Effect of Mn:Bi Ratio in the Growth of MnBi2Te4 Bulk Crystals
Study of the Effect of Mn:Bi Ratio in the Growth of MnBi2Te4 Bulk Crystals
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Mn:Bi比对MnBi2Te4块状晶体生长影响的研究
DOI：
10.1016/j.jcrysgro.2021.126456
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发表时间：
2021-11
影响因子：
1.8
通讯作者：
Yong Zhao
中科院分区：
文献类型：
--
作者：
H.J. Liu;Zhang Jianjing;Ke Zhao;Xinsheng Yang;Yong Zhao
• MnBi 2 Te 4 结构出现的临界Mn:Bi 比率约为0.1:1。 • MnBi 2 Te 4 晶体由一些Bi 2 Te 3 QL结构以不同的顺序结合。 • 一种在大约一周内生长MnBi 2 Te 4 晶体的自熔剂方法。反铁磁拓扑绝缘体MnBi 2 Te 4 近年来引起了人们的极大兴趣。然而，大尺寸单晶的生长技术仍然需要改进。起始原料中的Mn:Bi比或MnTe:Bi 2 Te 3 比是影响合成结果的重要因素。我们采用了一种相对简单的自熔方法，直接使用三种元素，仅涉及一个烧结过程。我们系统地研究了从 1:2（化学计量比）到 1:20 不同 Mn:Bi 比例获得的晶体。结构表征显示化学成分的转变，从完全MnBi 2 Te 4 七原子层到MnBi 4 Te 7 结构，最后到Mn掺杂的Bi 2 Te 3 。其中发现了具有多种结构的杂化晶体。总结了结果与起始原料配比之间的关系，可为晶体生长和该领域今后的研究提供有益的参考。
• A critical Mn:Bi ratio of about 0.1:1 for MnBi 2 Te 4 structure to emerge. • MnBi 2 Te 4 crystals incorporated by some Bi 2 Te 3 QL structures in various orders. • A self-flux method for growing MnBi 2 Te 4 crystals in about one week. The antiferromagnetic topological insulator MnBi 2 Te 4 has drawn great interest in recent years. However, techniques for the growth of sizeable single crystals still need to be improved. Mn:Bi ratio or MnTe:Bi 2 Te 3 ratio in the starting material is an important factor that affects the outcome of synthesis. We employed a relatively simple self-flux method that uses the three elements directly and involves only one sintering procedure. We systematically studied the crystals obtained with different Mn:Bi ratio, from 1:2 (the stoichiometric ratio) to 1:20. Structural characterization shows the shift in the chemical compositions, from entirely MnBi 2 Te 4 septuple-atomic layers, to the MnBi 4 Te 7 structure and finally to Mn-doped Bi 2 Te 3 . Hybrid crystals with multiple types of structures are found among them. The relation between the results and the starting material ratios is summarized, and can provide useful reference for the crystal growth and future researches in this area.
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影响因子：
18.9
作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1103/physrevb.100.121104
发表时间：
2019-03
期刊：
arXiv: Strongly Correlated Electrons
影响因子：
--
作者：
R. C. Vidal;H. Bentmann;T. Peixoto;A. Zeugner;S. Moser;C. Min;S. Schatz;K. Kißner;M. Unzelmann;C. Fornari;H. B. Vasili;M. Valvidares;K. Sakamoto;J. Fujii;I. Vobornik;T. Kim;R. Koch;C. Jozwiak;A. Bostwick;J. Denlinger;E. Rotenberg;J. Buck;M. Hoesch;F. Diekmann;S. Rohlf;M. Kallane;K. Rossnagel;M. Otrokov;E. Chulkov;M. Ruck;A. Isaeva;F. Reinert
通讯作者：
R. C. Vidal;H. Bentmann;T. Peixoto;A. Zeugner;S. Moser;C. Min;S. Schatz;K. Kißner;M. Unzelmann;C. Fornari;H. B. Vasili;M. Valvidares;K. Sakamoto;J. Fujii;I. Vobornik;T. Kim;R. Koch;C. Jozwiak;A. Bostwick;J. Denlinger;E. Rotenberg;J. Buck;M. Hoesch;F. Diekmann;S. Rohlf;M. Kallane;K. Rossnagel;M. Otrokov;E. Chulkov;M. Ruck;A. Isaeva;F. Reinert
影响因子：
3.7
作者：
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影响因子：
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通讯作者：
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