Yao Xiong, Cui Qirui, Huang Zengle, Yuan Xiaoyu, Yi Hee Taek, Jain Deepti, Kisslinger Kim, Han Myung-Geun, Wu Weida, Yang Hongxin, Oh Seongshik
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Center for Quantum Materials Synthesis and Department of Physics & Astronomy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States.
Nano Lett. 2024 Aug 14;24(32):9923-9930. doi: 10.1021/acs.nanolett.4c02320. Epub 2024 Jul 30.
The natural van der Waals superlattice MnBiTe-(BiTe) provides an optimal platform to combine topology and magnetism in one system with minimal structural disorder. Here, we show that this system can harbor both ferromagnetic (FM) and antiferromagnetic (AFM) orders and that these magnetic orders can be controlled in two different ways by either varying the Mn-Mn distance while keeping the BiTe/MnBiTe ratio constant or vice versa. We achieve this by creating atomically engineered sandwich structures composed of BiTe and MnBiTe layers. We show that the AFM order is exclusively determined by the Mn-Mn distance, whereas the FM order depends only on the overall BiTe/MnBiTe ratio regardless of the distance between the MnBiTe layers. Our results shed light on the origins of the AFM and FM orders and provide insights into how to manipulate magnetic orders not only for the MnBiTe-BiTe system but also for other magneto-topological materials.
天然范德华超晶格MnBiTe-(BiTe)提供了一个理想的平台，可在结构无序最小的单一系统中结合拓扑和磁性。在此，我们表明该系统可同时存在铁磁（FM）和反铁磁（AFM）序，并且这些磁序可以通过两种不同方式进行控制：在保持BiTe/MnBiTe比例不变的情况下改变Mn-Mn间距，或者反之亦然。我们通过创建由BiTe和MnBiTe层组成的原子工程三明治结构来实现这一点。我们表明，AFM序仅由Mn-Mn间距决定，而FM序仅取决于总的BiTe/MnBiTe比例，与MnBiTe层之间的距离无关。我们的结果揭示了AFM和FM序的起源，并为如何不仅在MnBiTe-BiTe系统中，而且在其他磁拓扑材料中操纵磁序提供了见解。
