Intrinsic piezoelectric ferromagnetism with large out-of-plane piezoelectric response in Janus monolayer CrBr1.5I1.5

doi:10.1063/5.0055014

CORC > 金属研究所 > 中国科学院金属研究所

	Intrinsic piezoelectric ferromagnetism with large out-of-plane piezoelectric response in Janus monolayer CrBr1.5I1.5
	Guo, San-Dong 2; Guo, Xiao-Shu 2; Cai, Xiu-Xia 2; Mu, Wen-Qi 2; Ren, Wen-Cai 1,3
刊名	JOURNAL OF APPLIED PHYSICS
	2021-06-07
卷号	129 期号:21 页码:10
ISSN号	0021-8979
DOI	10.1063/5.0055014
通讯作者	Guo, San-Dong(sandongyuwang@163.com)
英文摘要	A two-dimensional (2D) material system with both piezoelectric and ferromagnetic (FM) orders, referred to as a 2D piezoelectric ferromagnetism (PFM), may open up unprecedented opportunities for intriguing physics. Inspired by experimentally synthesized Janus monolayer MoSSe from MoS2, in this work, the Janus monolayer CrBr1.5I1.5 with dynamic, mechanical, and thermal stabilities is predicted, which is constructed from synthesized ferromagnetic CrI3 monolayer by replacing the top I atomic layer with Br atoms. Calculated results show that monolayer CrBr1.5I1.5 is an intrinsic FM half semiconductor with valence and conduction bands being fully spin-polarized in the same spin direction. Furthermore, monolayer CrBr1.5I1.5 possesses a sizable magnetic anisotropy energy. By symmetry analysis, it is found that both in-plane and out-of-plane piezoelectric polarizations can be induced by a uniaxial strain in the basal plane. The calculated in-plane d(22) value of 0.557 pm/V is small. However, more excitingly, the out-of-plane d(31) is as high as 1.138 pm/V, which is obviously higher compared with that of other 2D known materials. The strong out-of-plane piezoelectricity is highly desirable for ultrathin piezoelectric devices. Moreover, strain engineering is used to tune piezoelectricity of monolayer CrBr1.5I1.5. It is found that compressive strain can improve d(22) and tensile strain can enhance d(31). A FM order to antiferromagnetic order phase transition can be induced by compressive strain, and the critical point is about 0.95 strain. That is to say that 2D piezoelectric antiferromagnetism can be achieved by compressive strain, and the corresponding d 22 and d 31 are 0.677 and 0.999 pm/V at 0.94 strain, respectively. It is also found that magnetic order has important effects on piezoelectricity of monolayer CrBr1.5I1.5. Finally, similar to CrBr1.5I1.5, the PFM can also be realized in the monolayers CrBr1.5I1.5 and CrBr1.5I1.5. Amazingly, their d 31 can reach up to 2.578 and 1.804 pm/V for monolayers CrBr1.5I1.5 and CrBr1.5I1.5. Our paper proposes a realistic way to achieve PFM with large d(31), making these systems very promising for multifunctional semiconductor spintronic applications. Published under an exclusive license by AIP Publishing.
资助项目	Natural Science Basis Research Plan in Shaanxi Province of China[2021JM-456] ; Advanced Analysis and Computation Center of China University of Mining and Technology (CUMT)
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000656646600007
资助机构	Natural Science Basis Research Plan in Shaanxi Province of China ; Advanced Analysis and Computation Center of China University of Mining and Technology (CUMT)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160319]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, San-Dong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Xian Univ Posts & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Guo, San-Dong,Guo, Xiao-Shu,Cai, Xiu-Xia,et al. Intrinsic piezoelectric ferromagnetism with large out-of-plane piezoelectric response in Janus monolayer CrBr1.5I1.5[J]. JOURNAL OF APPLIED PHYSICS,2021,129(21):10.
APA	Guo, San-Dong,Guo, Xiao-Shu,Cai, Xiu-Xia,Mu, Wen-Qi,&Ren, Wen-Cai.(2021).Intrinsic piezoelectric ferromagnetism with large out-of-plane piezoelectric response in Janus monolayer CrBr1.5I1.5.JOURNAL OF APPLIED PHYSICS,129(21),10.
MLA	Guo, San-Dong,et al."Intrinsic piezoelectric ferromagnetism with large out-of-plane piezoelectric response in Janus monolayer CrBr1.5I1.5".JOURNAL OF APPLIED PHYSICS 129.21(2021):10.