中国物理B ›› 2023, Vol. 32 ›› Issue (6): 67701-067701.doi: 10.1088/1674-1056/acaa2b

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Multiferroic monolayers VOX (X = Cl, Br, I): Tunable ferromagnetism via charge doping and ferroelastic switching

Hong-Chao Yang(杨洪超), Peng-Cheng Liu(刘鹏程), Liu-Yu Mu(穆鎏羽), Ying-De Li(李英德), Kai Han(韩锴), and Xiao-Le Qiu(邱潇乐)   

  1. School of Physics and Electronic Information, Weifang University, Weifang 261061, China
  • 收稿日期:2022-10-12 修回日期:2022-11-25 接受日期:2022-12-09 出版日期:2023-05-17 发布日期:2023-06-05
  • 通讯作者: Hong-Chao Yang, Xiao-Le Qiu E-mail:hc_yang90@163.com;qiu.xiaole@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12104344 and 61674003), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2021QA096), the Science and Technology Development Program of Weifang High-tech Industrial Development Zone, China (Grant No. 2020KJHM03), and the Doctoral Research Start-up Foundation of Weifang University, China (Grant No. 2021BS05).

Multiferroic monolayers VOX (X = Cl, Br, I): Tunable ferromagnetism via charge doping and ferroelastic switching

Hong-Chao Yang(杨洪超), Peng-Cheng Liu(刘鹏程), Liu-Yu Mu(穆鎏羽), Ying-De Li(李英德), Kai Han(韩锴), and Xiao-Le Qiu(邱潇乐)   

  1. School of Physics and Electronic Information, Weifang University, Weifang 261061, China
  • Received:2022-10-12 Revised:2022-11-25 Accepted:2022-12-09 Online:2023-05-17 Published:2023-06-05
  • Contact: Hong-Chao Yang, Xiao-Le Qiu E-mail:hc_yang90@163.com;qiu.xiaole@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12104344 and 61674003), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2021QA096), the Science and Technology Development Program of Weifang High-tech Industrial Development Zone, China (Grant No. 2020KJHM03), and the Doctoral Research Start-up Foundation of Weifang University, China (Grant No. 2021BS05).

摘要: The fascinating properties arising from the interaction between different ferroic states of two-dimensional (2D) materials have inspired tremendous research interest in the past few years. Under the first-principles calculations, we predict the coexistence of antiferromagnetic and ferroelastic states in VO$X$ ($X={\rm Cl}$, Br, I) monolayers. The results illustrate that the VO$X$ monolayers exhibit indirect bandgap characteristics, $i.e.$, their gaps decrease with the halide elements changing from Cl to I. The ground states of all these VO$X$ monolayers are antiferromagnetic (AFM) with the magnetic moments contributed by the V 3d electrons. Furthermore, the magnetic ground state changing from AFM to ferromagnetism (FM) can be realized by doping carriers. In addition, the moderate ferroelastic transition barrier and reversible switching signal ensure their high performances of nonvolatile memory devices. Our findings not only offer an ideal platform for investigating the multiferroic properties, but also provide candidate materials for potential applications in spintronics.

关键词: antiferromagnetic, ferroelastic, carrier doping, multiferroic states

Abstract: The fascinating properties arising from the interaction between different ferroic states of two-dimensional (2D) materials have inspired tremendous research interest in the past few years. Under the first-principles calculations, we predict the coexistence of antiferromagnetic and ferroelastic states in VO$X$ ($X={\rm Cl}$, Br, I) monolayers. The results illustrate that the VO$X$ monolayers exhibit indirect bandgap characteristics, $i.e.$, their gaps decrease with the halide elements changing from Cl to I. The ground states of all these VO$X$ monolayers are antiferromagnetic (AFM) with the magnetic moments contributed by the V 3d electrons. Furthermore, the magnetic ground state changing from AFM to ferromagnetism (FM) can be realized by doping carriers. In addition, the moderate ferroelastic transition barrier and reversible switching signal ensure their high performances of nonvolatile memory devices. Our findings not only offer an ideal platform for investigating the multiferroic properties, but also provide candidate materials for potential applications in spintronics.

Key words: antiferromagnetic, ferroelastic, carrier doping, multiferroic states

中图分类号:  (Multiferroic/magnetoelectric films)

  • 77.55.Nv
66.30.J- (Diffusion of impurities ?)