Prediction of the two-dimensional Janus ferrovalley material LaBrI

doi:10.1103/PhysRevB.104.035430

	Prediction of the two-dimensional Janus ferrovalley material LaBrI
	Jiang, Peng 1,2,3,4; Kang, Lili 2; Li, Yan-Ling 1; Zheng, Xiaohong 2; Zeng, Zhi 2; Sanvito, Stefano 3,4
刊名	PHYSICAL REVIEW B
	2021-07-26
卷号	104
ISSN号	2469-9950
DOI	10.1103/PhysRevB.104.035430
通讯作者	Zheng, Xiaohong(xhzheng@theory.issp.ac.cn)
英文摘要	Two-dimensional (2D) ferrovalley materials, displaying coexistence of spontaneous spin and valley polarizations, have recently attracted significant attention due to their potential for applications in the fields of spintronics and valleytronics. However, unfortunately, to date only a few 2D ferrovalley materials exist. Here, first-principles calculations predict a 2D Janus ferrovalley material lanthanum bromiodide (LaBrI). It is found that LaBrI is a stable ferromagnetic electride, whose magnetic moment originates mainly from the interstitial anionic electrons. The magnetic transition temperature of LaBrI monolayers is estimated to be far beyond room temperature, and a sizable magnetic anisotropy with easy in-plane magnetization is also present. Most importantly, LaBrI monolayers exhibit a large valley polarization due to the concurrent broken space- and time-reversal symmetries, with the calculated valley polarization reaching up to 59 meV. This value is comparable to that of the ferrovalley materials reported to date. Intriguingly, the inequivalent Berry curvature at the two valleys takes opposite values, giving rise to an anomalous valley Hall effect, where a valley current with an accompanying net charge Hall current may be induced.
资助项目	National Natural Science Foundation of China[11974355] ; National Natural Science Foundation of China[12074153] ; Irish Research Council[IRCLA/2019/127]
WOS关键词	VALLEY POLARIZATION ; FERROMAGNETISM ; ENERGY ; MONOLAYERS ; DISCOVERY ; MOS2
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000678807700011
资助机构	National Natural Science Foundation of China ; Irish Research Council
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123127]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, Xiaohong
作者单位	1.Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 3.Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland 4.Trinity Coll Dublin, CRANN Inst, Dublin 2, Ireland
推荐引用方式 GB/T 7714	Jiang, Peng,Kang, Lili,Li, Yan-Ling,et al. Prediction of the two-dimensional Janus ferrovalley material LaBrI[J]. PHYSICAL REVIEW B,2021,104.
APA	Jiang, Peng,Kang, Lili,Li, Yan-Ling,Zheng, Xiaohong,Zeng, Zhi,&Sanvito, Stefano.(2021).Prediction of the two-dimensional Janus ferrovalley material LaBrI.PHYSICAL REVIEW B,104.
MLA	Jiang, Peng,et al."Prediction of the two-dimensional Janus ferrovalley material LaBrI".PHYSICAL REVIEW B 104(2021).