Spin mapping of intralayer antiferromagnetism and field-induced spin reorientation in monolayer CrTe2

Jing-Jing Xian, Cong Wang, Jin-Hua Nie, Rui Li, Mengjiao Han, Junhao Lin, Wen-Hao Zhang, Zhen-Yu Liu, Zhi-Mo Zhang, Mao-Peng Miao, Yangfan Yi, Shiwei Wu, Xiaodie Chen, Junbo Han, Zhengcai Xia, Wei Ji () and Ying-Shuang Fu ()
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Jing-Jing Xian: Huazhong University of Science and Technology
Cong Wang: Renmin University of China
Jin-Hua Nie: Huazhong University of Science and Technology
Rui Li: Huazhong University of Science and Technology
Mengjiao Han: Southern University of Science and Technology
Junhao Lin: Southern University of Science and Technology
Wen-Hao Zhang: Huazhong University of Science and Technology
Zhen-Yu Liu: Huazhong University of Science and Technology
Zhi-Mo Zhang: Huazhong University of Science and Technology
Mao-Peng Miao: Huazhong University of Science and Technology
Yangfan Yi: Fudan University
Shiwei Wu: Fudan University
Xiaodie Chen: Huazhong University of Science and Technology
Junbo Han: Huazhong University of Science and Technology
Zhengcai Xia: Huazhong University of Science and Technology
Wei Ji: Renmin University of China
Ying-Shuang Fu: Huazhong University of Science and Technology

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Intrinsic antiferromagnetism in van der Waals (vdW) monolayer (ML) crystals enriches our understanding of two-dimensional (2D) magnetic orders and presents several advantages over ferromagnetism in spintronic applications. However, studies of 2D intrinsic antiferromagnetism are sparse, owing to the lack of net magnetisation. Here, by combining spin-polarised scanning tunnelling microscopy and first-principles calculations, we investigate the magnetism of vdW ML CrTe2, which has been successfully grown through molecular-beam epitaxy. We observe a stable antiferromagnetic (AFM) order at the atomic scale in the ML crystal, whose bulk is ferromagnetic, and correlate its imaged zigzag spin texture with the atomic lattice structure. The AFM order exhibits an intriguing noncollinear spin reorientation under magnetic fields, consistent with its calculated moderate magnetic anisotropy. The findings of this study demonstrate the intricacy of 2D vdW magnetic materials and pave the way for their in-depth analysis.

Date: 2022
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DOI: 10.1038/s41467-021-27834-z

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