Ferromagnetism emerged from non-ferromagnetic atomic crystals

Cheng Gong, Peiyao Zhang, Tenzin Norden, Quanwei Li, Zhen Guo, Apoorva Chaturvedi, Arman Najafi, Shoufeng Lan, Xiaoze Liu, Yuan Wang, Shi-Jing Gong, Hao Zeng, Hua Zhang, Athos Petrou and Xiang Zhang ()
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Cheng Gong: University of California
Peiyao Zhang: University of California
Tenzin Norden: State University of New York
Quanwei Li: University of California
Zhen Guo: University of California
Apoorva Chaturvedi: Nanyang Technological University
Arman Najafi: State University of New York
Shoufeng Lan: University of California
Xiaoze Liu: University of California
Yuan Wang: University of California
Shi-Jing Gong: East China Normal University
Hao Zeng: State University of New York
Hua Zhang: City University of Hong Kong
Athos Petrou: State University of New York
Xiang Zhang: University of California

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract The recently emerged ferromagnetic two-dimensional (2D) materials provide unique platforms for compact spintronic devices down to the atomic-thin regime; however, the prospect is hindered by the limited number of ferromagnetic 2D materials discovered with limited choices of magnetic properties. If 2D antiferromagnetism could be converted to 2D ferromagnetism, the range of 2D magnets and their potential applications would be significantly broadened. Here, we discovered emergent ferromagnetism by interfacing non-magnetic WS2 layers with the antiferromagnetic FePS3. The WS2 exhibits an order of magnitude enhanced Zeeman effect with a saturated interfacial exchange field ~38 Tesla. Given the pristine FePS3 is an intralayer antiferromagnet, the prominent interfacial exchange field suggests the formation of ferromagnetic FePS3 at interface. Furthermore, the enhanced Zeeman effect in WS2 is found to exhibit a strong WS2-thickness dependence, highlighting the layer-tailorable interfacial exchange coupling in WS2-FePS3 heterostructures, which is potentially attributed to the thickness-dependent interfacial hybridization.

Date: 2023
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DOI: 10.1038/s41467-023-39002-6

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