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Spin direction dependent quantum anomalous Hall effect in two-dimensional ferromagnetic materials |
Yu-Xian Yang(杨宇贤) and Chang-Wen Zhang(张昌文)† |
School of Physics and Technology, University of Jinan, Jinan 250022, China |
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Abstract We propose a scheme for realizing the spin direction-dependent quantum anomalous Hall effect (QAHE) driven by spin—orbit couplings (SOC) in two-dimensional (2D) materials. Based on the sp3 tight-binding (TB) model, we find that these systems can exhibit a QAHE with out-of-plane and in-plane magnetization for the weak and strong SOC, respectively, in which the mechanism of quantum transition is mainly driven by the band inversion of px,y/pz orbitals. As a concrete example, based on first-principles calculations, we realize a real material of monolayer 1T-SnN2/PbN2 exhibiting the QAHE with in-plane/out-of-plane magnetization characterized by the nonzero Chern number C and topological edge states. These findings provide useful guidance for the pursuit of a spin direction-dependent QAHE and hence stimulate immediate experimental interest.
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Received: 18 June 2023
Revised: 07 December 2023
Accepted manuscript online: 08 December 2023
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PACS:
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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73.43.-f
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(Quantum Hall effects)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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Fund: Project supported by Taishan Scholar Program of Shandong Province (Grant No. ts20190939), Independent Cultivation Program of Innovation Team of Jinan City (Grant No. 2021GXRC043), and the National Natural Science Foundation of China (Grant No. 52173283). |
Corresponding Authors:
Chang-Wen Zhang
E-mail: ss_zhangchw@ujn.edu.cn
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Cite this article:
Yu-Xian Yang(杨宇贤) and Chang-Wen Zhang(张昌文) Spin direction dependent quantum anomalous Hall effect in two-dimensional ferromagnetic materials 2024 Chin. Phys. B 33 047101
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