Ferroelectricity and Phase Transitions in Monolayer Group-IV   Monochalcogenides

doi:10.1103/PhysRevLett.117.097601

CORC > 北京大学 > 工学院

	Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides
	Fei, Ruixiang ; Kang, Wei ; Yang, Li
刊名	PHYSICAL REVIEW LETTERS
	2016
关键词	THIN-FILMS SNSE POLARIZATION BATIO3 SEMICONDUCTORS NANOSCALE PBTIO3
DOI	10.1103/PhysRevLett.117.097601
英文摘要	Ferroelectricity usually fades away as materials are thinned down below a critical value. We reveal that the unique ionic-potential anharmonicity can induce spontaneous in-plane electrical polarization and ferroelectricity in monolayer group-IV monochalcogenides MX (M = Ge, Sn; X = S, Se). An effective Hamiltonian has been successfully extracted from the parametrized energy space, making it possible to study the ferroelectric phase transitions in a single-atom layer. The ferroelectricity in these materials is found to be robust and the corresponding Curie temperatures are higher than room temperature, making them promising for realizing ultrathin ferroelectric devices of broad interest. We further provide the phase diagram and predict other potentially two-dimensional ferroelectric materials.; National Science Foundation (NSF) CAREER Grant [DMR-1455346]; NSF [EFRI-2DARE-1542815]; International Center for Advanced Renewable Energy & Sustainability (I-CARES); SCI(E); EI; PubMed; ARTICLE; weikang@pku.edu.cn; lyang@physics.wustl.edu; 9; 097601; 117
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491547]
专题	工学院
推荐引用方式 GB/T 7714	Fei, Ruixiang,Kang, Wei,Yang, Li. Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides[J]. PHYSICAL REVIEW LETTERS,2016.
APA	Fei, Ruixiang,Kang, Wei,&Yang, Li.(2016).Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides.PHYSICAL REVIEW LETTERS.
MLA	Fei, Ruixiang,et al."Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides".PHYSICAL REVIEW LETTERS (2016).