Zhang Huisheng, Ning Yaohui, Yang Wenjia, Zhang Jiayong, Zhang Ruiqiang, Xu Xiaohong
Key Laboratory of Magnetic Molecules and Magnetic Information Materials of the Ministry of Education, Research Institute of Materials Science, and College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China.
State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China and Ψusts Institute, Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China.
Phys Chem Chem Phys. 2019 Aug 21;21(31):17087-17095. doi: 10.1039/c9cp03219c. Epub 2019 Jul 24.
The recent studies of magno-assisted tunnelling in ferromagnetic van der Waals heterostructures formed by graphene and ultrathin CrBr films (D. Ghazaryan et al., Nat. Electron., 2018, 1, 344) offer broader opportunities for exploration of novel quantum phenomena, especially for realizing the graphene-based quantum anomalous Hall effect (QAHE). Based on first-principles approaches, we reveal that three types of graphene/CrBr (Gr/CrBr) heterostructures exhibit metallic band behavior due to strong charge-transfer at the interfaces of these heterosystems. Remarkably, the pressure-induced QAHE can be achieved in Gr/CrBr and CrBr/Gr/CrBr systems. Further low energy k·p model analyses show that the nontrivial topological properties are mainly attributed to the Rashba spin-orbit coupling (SOC), but not to the intrinsic SOC of graphene. Moreover, a multichannel device prototype is proposed in the superlattices composed of Gr/CrBr and normal insulator (such as hexagonal boron nitride) layers. Our work provides an experimentally feasible scheme for realizing the high-temperature and multichannel QAHE in graphene-based heterostructures.
近期关于由石墨烯和超薄CrBr薄膜形成的铁磁范德华异质结构中的磁辅助隧穿的研究（D. Ghazaryan等人，《自然·电子学》，20……
