在MnBi2Te4-Bi2Te3的拓异构结构中,原子层控制的磁顺序
Xiong Yao1,2, Qirui Cui1,3, Zengle Huang4
1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Nano letters
|July 30, 2024
概括
这项研究探讨了MnBi2Te4-Bi2Te3超格子中的磁性顺序. 研究人员发现,通过调整层组成和间距,可以精确控制铁磁和反铁磁的顺序.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 范德瓦尔斯 (vdW) 的异构结构为新出现的现象提供了独特的平台.
- MnBi2Te4-(Bi2Te3) n是一种天然的vdW材料,结合了拓和磁性.
- 了解和控制磁顺序对于自旋电子应用至关重要.
研究的目的:
- 为了研究MnBi2Te4-Bi2Te3 vdW超级格子中的结构和磁性秩序之间的相互作用.
- 展示用于独立控制铁磁 (FM) 和反铁磁 (AFM) 订单的方法.
- 在这个系统中阐明FM和AFM订单的基本起源.
主要方法:
- 使用Bi2Te3和MnBi2Te4层制造原子工程三明治结构.
- Mn-Mn原子间距离的系统变化.
- 在Bi2Te3/MnBi2Te4比率的系统变化.
主要成果:
- 该系统展示了铁磁 (FM) 和反铁磁 (AFM) 订单.
- 飞行指令的顺序完全取决于Mn-Mn距离.
- FM顺序完全取决于整体Bi2Te3/MnBi2Te4比率,无论Mn-Mn距离如何.
- 通过结构工程来实现FM和AFM订单的独立控制.
结论:
- 该研究提供了对AFM和FM订单在MnBi2Te4-Bi2Te3.4中的不同起源的清晰理解.
- 原子级结构控制允许在vdW异构结构中调节磁性特性.
- 这些发现为设计和操纵磁拓材料中的磁顺序提供了路线图.
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