Out-of-Plane Piezoelectricity and Ferroelectricity in Layered   alpha-In2Se3 Nanoflakes

doi:10.1021/acs.nanolett.7b02198

CORC > 北京大学 > 化学与分子工程学院

	Out-of-Plane Piezoelectricity and Ferroelectricity in Layered alpha-In2Se3 Nanoflakes
	Zhou, Yu ; Wu, Di ; Zhu, Yihan ; Cho, Yujin ; He, Qing ; Yang, Xiao ; Herrera, Kevin ; Chu, Zhaodong ; Han, Yu ; Downer, Michael C. ; Peng, Hailin ; Lai, Keji
刊名	NANO LETTERS
	2017
关键词	In2Se3 2D materials piezoelectric ferroelectric polarization TRANSITION-METAL DICHALCOGENIDES THIN-FILM TOPOLOGICAL INSULATOR INDIUM SELENIDES IN2SE3 OPTOELECTRONICS NANORIBBONS CRYSTALS OXIDES FLAKES
DOI	10.1021/acs.nanolett.7b02198
英文摘要	Piezoelectric and ferroelectric properties in the two-dimensional (2D) limit are highly desired for nanoelectronic, electromechanical, and optoelectronic applications. Here we report the first experimental evidence of out-of-plane piezoelectricity and ferroelectricity in van der Waals layered alpha-In2Se3 nanoflakes. The noncentrosymmetric R3m symmetry of the alpha-In2Se3 samples is confirmed by scanning transmission electron microscopy, second-harmonic generation, and Raman spectroscopy measurements. Domains with opposite polarizations are visualized by piezo-response force microscopy. Single-point poling experiments suggest that the polarization is potentially switchable for alpha-In2Se3 nanoflakes with thicknesses down to similar to 10 nm. The piezotronic effect is demonstrated in two-terminal devices, where the Schottky barrier can be modulated by the strain-induced piezopotential. Our work on polar alpha-In2Se3, one of the model 2D piezoelectrics and ferroelectrics with simple crystal structures, shows its great potential in electronic and photonic applications.; Welch Foundation Grant [F-1814]; NSF EFRI [EFMA-1542747]; Welch Grant [F-1038]; National Basic Research Program of China [2014CB932500]; National Natural Science Foundation of China [21525310]; SCI(E); ARTICLE; 9; 5508-5513; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471057]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhou, Yu,Wu, Di,Zhu, Yihan,et al. Out-of-Plane Piezoelectricity and Ferroelectricity in Layered alpha-In2Se3 Nanoflakes[J]. NANO LETTERS,2017.
APA	Zhou, Yu.,Wu, Di.,Zhu, Yihan.,Cho, Yujin.,He, Qing.,...&Lai, Keji.(2017).Out-of-Plane Piezoelectricity and Ferroelectricity in Layered alpha-In2Se3 Nanoflakes.NANO LETTERS.
MLA	Zhou, Yu,et al."Out-of-Plane Piezoelectricity and Ferroelectricity in Layered alpha-In2Se3 Nanoflakes".NANO LETTERS (2017).