Unveiling magnetism in individual CuCrP2S6 flakes by magnetic proximity effect

Author:

Tang Wei1ORCID,Zhao Duo1,Weng Xiaoliang1,Wu Kewen1,Yang Zhi2,Kang Chenxu1,Sun Yuting1,Jiang Wei-Chao1,Liang Huawei1ORCID,Wang Chao2ORCID,Zeng Yu-Jia1ORCID

Affiliation:

1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University 1 , Shenzhen 518060, China

2. Institute of Nanosurface Science and Engineering, Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University 2 , Shenzhen 518060, China

Abstract

Two-dimensional (2D) multiferroic CuCrP2S6 shows great potential in nonvolatile devices, in which its possible magnetoelectric coupling also allows for spin manipulation using multiple degrees-of-freedom. However, local measurements on individual 2D CuCrP2S6 remain limited mainly due to its insulating nature at low temperature. Here, we report the experimental observation of anomalous Hall effect in the CuCrP2S6/few-layer graphene bilayer structures taking advantage of magnetic proximity effect. We find that the saturation field of anomalous Hall effect is significantly smaller than that of bulk CuCrP2S6, which is believed to result from the charge transfer between CuCrP2S6 and few-layer graphene. Density functional theory calculation further reveals that the coupling between CuCrP2S6 and few-layer graphene results in the exchange splitting in graphene. Our work not only sheds light on the magnetism of individual 2D CuCrP2S6 but also paves the way toward emerging 2D heterostructures for novel magnetoelectric coupling.

Funder

National Natural Science Foundation of China

Guangdong Basic and Applied Basic Research Foundation

Shenzhen Science and Technology Foundation

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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