中国物理B ›› 2022, Vol. 31 ›› Issue (12): 127303-127303.doi: 10.1088/1674-1056/ac89d5

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Manipulation of intrinsic quantum anomalous Hall effect in two-dimensional MoYN2CSCl MXene

Yezhu Lv(吕叶竹), Peiji Wang(王培吉), and Changwen Zhang(张昌文)   

  1. School of Physics and Technology, Institute of Spintronics, University of Jinan, Jinan 250022, China
  • 收稿日期:2022-06-11 修回日期:2022-08-13 接受日期:2022-08-16 出版日期:2022-11-11 发布日期:2022-11-28
  • 通讯作者: Changwen Zhang E-mail:ss_zhangchw@ujn.edu.cn
  • 基金资助:
    Project supported by Taishan Scholar Program of Shandong Province, China (Grant No. ts20190939), Independent Cultivation Program of Innovation Team of Jinan City (Grant No. 2021GXRC043), Shandong Provincial Natural Science Foundation (Grant No. ZR2020QA052), and National Natural Science Foundation of China (Grant Nos. 52173283 and 62071200).

Manipulation of intrinsic quantum anomalous Hall effect in two-dimensional MoYN2CSCl MXene

Yezhu Lv(吕叶竹), Peiji Wang(王培吉), and Changwen Zhang(张昌文)   

  1. School of Physics and Technology, Institute of Spintronics, University of Jinan, Jinan 250022, China
  • Received:2022-06-11 Revised:2022-08-13 Accepted:2022-08-16 Online:2022-11-11 Published:2022-11-28
  • Contact: Changwen Zhang E-mail:ss_zhangchw@ujn.edu.cn
  • Supported by:
    Project supported by Taishan Scholar Program of Shandong Province, China (Grant No. ts20190939), Independent Cultivation Program of Innovation Team of Jinan City (Grant No. 2021GXRC043), Shandong Provincial Natural Science Foundation (Grant No. ZR2020QA052), and National Natural Science Foundation of China (Grant Nos. 52173283 and 62071200).

摘要: Quantum anomalous Hall effect (QAHE) is an innovative topological spintronic phenomenon with dissipationless chiral edge states and attracts rapidly increasing attention. However, it has only been observed in few materials in experiments. Here, according to the first-principles calculations, we report that the MXene MoYN$_{2}$CSCl shows a topologically nontrivial band gap of 37.3~meV, possessing QAHE with a Chern number of $C = 1$, which is induced by band inversion between $ {\rm d}_{xz}$ and ${\rm d}_{yz}$ orbitals. Also, the topological phase transition for the MoYN$_{2}$CSCl can be realized via strain or by turning the magnetization direction. Remarkably, MoYN$_{2}$CSCl shows the nodal-line semimetal state dependent on the electron correlation $U$. Our findings add an experimentally accessible and tunable member to the QAHE family, which stands a chance of enriching the applications in spintronics.

关键词: MoYN2CSCl MXene, quantum anomalous Hall effect, topological phase, first-principles calculations

Abstract: Quantum anomalous Hall effect (QAHE) is an innovative topological spintronic phenomenon with dissipationless chiral edge states and attracts rapidly increasing attention. However, it has only been observed in few materials in experiments. Here, according to the first-principles calculations, we report that the MXene MoYN$_{2}$CSCl shows a topologically nontrivial band gap of 37.3~meV, possessing QAHE with a Chern number of $C = 1$, which is induced by band inversion between $ {\rm d}_{xz}$ and ${\rm d}_{yz}$ orbitals. Also, the topological phase transition for the MoYN$_{2}$CSCl can be realized via strain or by turning the magnetization direction. Remarkably, MoYN$_{2}$CSCl shows the nodal-line semimetal state dependent on the electron correlation $U$. Our findings add an experimentally accessible and tunable member to the QAHE family, which stands a chance of enriching the applications in spintronics.

Key words: MoYN2CSCl MXene, quantum anomalous Hall effect, topological phase, first-principles calculations

中图分类号:  (Surface states, band structure, electron density of states)

  • 73.20.At
73.43.-f (Quantum Hall effects) 73.43.Nq (Quantum phase transitions)