中国物理B ›› 2024, Vol. 33 ›› Issue (4): 47101-047101.doi: 10.1088/1674-1056/ad1380

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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)   

  1. School of Physics and Technology, University of Jinan, Jinan 250022, China
  • 收稿日期:2023-06-18 修回日期:2023-12-07 接受日期:2023-12-08 出版日期:2024-03-19 发布日期:2024-04-01
  • 通讯作者: Chang-Wen Zhang E-mail:ss_zhangchw@ujn.edu.cn
  • 基金资助:
    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).

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)   

  1. School of Physics and Technology, University of Jinan, Jinan 250022, China
  • Received:2023-06-18 Revised:2023-12-07 Accepted:2023-12-08 Online:2024-03-19 Published:2024-04-01
  • Contact: Chang-Wen Zhang E-mail:ss_zhangchw@ujn.edu.cn
  • Supported by:
    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).

摘要: 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.

关键词: topological phase transition, quantum anomalous Hall effect, first-principles calculations

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.

Key words: topological phase transition, quantum anomalous Hall effect, first-principles calculations

中图分类号:  (Density functional theory, local density approximation, gradient and other corrections)

  • 71.15.Mb
73.43.-f (Quantum Hall effects) 73.63.-b (Electronic transport in nanoscale materials and structures)