Relationship between disorder, magnetism and band topology in Mn(Sb1-x Bi x )2Te4 single crystals

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-12 DOI:10.1088/1674-1056/ad3dd8

Ming Xi, Hechang Lei

引用次数: 0

Abstract

We investigate the evolution of magnetic properties as well as the content and distribution of Mn for Mn(Sb1-x Bi x )2Te4 single crystals grown by large-temperature-gradient chemical vapor transport method. It is found that the ferromagnetic MnSb2Te4 changes to antiferromagnetism with Bi doping when x ≥ 0.25. Further analysis implies that the occupations of Mn ions at Sb/Bi site MnSb/Bi and Mn site MnMn have a strong influence on the magnetic ground state of these systems. With the decrease of MnMn and increase of MnSb/Bi, the system will favor the ferromagnetic ground state. In addition, the rapid decrease of T C/N with increasing Bi content when x ≤ 0.25 and the insensitivity of T N to x when x > 0.25 suggest that the main magnetic interaction may change from the Ruderman-Kittel-Kasuya-Yosida-type at low Bi doping region to the van-Vleck-type in high Bi doped samples.

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锰（Sb1-x Bi x ）2Te4 单晶中的无序性、磁性和带拓扑之间的关系

我们研究了大温度梯度化学气相传输方法生长的 Mn(Sb1-x Bi x )2Te4 单晶的磁性能演变以及锰的含量和分布。研究发现，当 x ≥ 0.25 时，铁磁性 MnSb2Te4 随着 Bi 的掺杂而转变为反铁磁性。进一步的分析表明，锰离子在 Sb/Bi 位点 MnSb/Bi 和 Mn 位点 MnMn 的占有率对这些体系的磁基态有很大影响。随着 MnMn 的减少和 MnSb/Bi 的增加，体系将倾向于铁磁基态。此外，当 x ≤ 0.25 时，T C/N 随 Bi 含量的增加而迅速降低，而当 x > 0.25 时，T N 对 x 不敏感，这表明在低 Bi 掺杂区，主要的磁相互作用可能从 Ruderman-Kittel-Kasuya-Yosida 型转变为高 Bi 掺杂样品中的 van-Vleck 型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.