Two-dimensional ferromagnetism and driven ferroelectricity in van der Waals CuCrP2S6

doi:10.1039/c9nr00738e

IMR OpenIR

	Two-dimensional ferromagnetism and driven ferroelectricity in van der Waals CuCrP2S6
	Lai, Youfang 1,2; Song, Zhigang 1,2,3; Wan, Yi 1,2; Xue, Mingzhu 1,2; Wang, Changsheng 1,2; Ye, Yu 1,2,4; Dai, Lun 1,2,4; Zhang, Zhidong 5; Yang, Wenyun 1,2,4; Du, Honglin 1,2; Yang, Jinbo 1,2,4,6
通讯作者	Song, Zhigang(szg@pku.edu.cn)
	2019-03-28
发表期刊	NANOSCALE
ISSN	2040-3364
卷号	11 期号:12 页码:5163-5170
摘要	Multiferroic materials have the potential to be applied in novel magnetoelectric devices, for example, high-density non-volatile storage devices. During the last decades, research on multiferroic materials was focused on three-dimensional (3D) materials. However, 3D materials suffer from dangling bonds and quantum tunneling in nano-scale thin films. Two-dimensional (2D) materials might provide an elegant solution to these problems, and thus are highly in demand. Using first-principles calculations, we predicted ferromagnetism and electric-field-driving ferroelectricity in the monolayer and even in the few-layers of CuCrP2S6. Although the total energy of the ferroelectric phase of the monolayer is higher than that of the antiferroelectric phase, the ferroelectric phases can be realized by applying a large electric field. Besides the degrees of freedom in the common multiferroic materials, the valley degree of freedom is also polarized, according to our calculations. The spins, electric dipoles and valleys are coupled with each other as shown in the computational results. In our experiment, we observed the out-of-plane ferroelectricity in few-layer CuCrP2S6 (approximately 13 nm thick) at room temperature. 2D ferromagnetism of few-layers is inferred from the magnetic hysteresis loops of the massively stacked nanosheets at 10 K. The experimental observations support our calculations very well. Our findings may provide a series of 2D materials for further device applications.
资助者	National Key Research and Development Program of China ; Natural Science Foundation of China ; National Materials Genome Project ; National Basic Research Program of China
DOI	10.1039/c9nr00738e
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFA0206303] ; Natural Science Foundation of China[11674005] ; Natural Science Foundation of China[51731001] ; Natural Science Foundation of China[11204110] ; National Materials Genome Project[2016YFB0700600] ; National Basic Research Program of China[2013CB932604]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000465361800003
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：116[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/133110
专题	中国科学院金属研究所
通讯作者	Song, Zhigang
作者单位	1.Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China 2.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 3.Univ Cambridge, Dept Engn, JJ Thomson Ave, Cambridge CB3 0FA, England 4.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 6.Beijing Key Lab Magnetoelect Mat & Devices, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Lai, Youfang,Song, Zhigang,Wan, Yi,et al. Two-dimensional ferromagnetism and driven ferroelectricity in van der Waals CuCrP2S6[J]. NANOSCALE,2019,11(12):5163-5170.
APA	Lai, Youfang.,Song, Zhigang.,Wan, Yi.,Xue, Mingzhu.,Wang, Changsheng.,...&Yang, Jinbo.(2019).Two-dimensional ferromagnetism and driven ferroelectricity in van der Waals CuCrP2S6.NANOSCALE,11(12),5163-5170.
MLA	Lai, Youfang,et al."Two-dimensional ferromagnetism and driven ferroelectricity in van der Waals CuCrP2S6".NANOSCALE 11.12(2019):5163-5170.