Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals

doi:10.1088/1674-1056/27/8/086301

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	Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals
	Hu, G ; Huang, JQ ; Wang, YN ; Yang, T ; Dong, BJ ; Wang, JZ ; Zhao, B 2; Ali, S ; Zhang, ZD
刊名	CHINESE PHYSICS B
	2018-08-01
卷号	27 期号:8 页码:-
关键词	flexural mode quadratic dispersion long-range interaction frequency redshift dielectric screening
ISSN号	1674-1056
DOI	10.1088/1674-1056/27/8/086301
英文摘要	Unusual quadratic dispersion of flexural vibrational mode and red-shift of Raman shift of in-plane mode with increasing layer-number are quite common and interesting in low-dimensional materials, but their physical origins still remain open questions. Combining ab initio density functional theory calculations with the empirical force-constant model, we study the lattice dynamics of two typical two-dimensional (2D) systems, few-layer h-BN and indium iodide (InI). We found that the unusual quadratic dispersion of flexural mode frequency on wave vector may be comprehended based on the competition between atomic interactions of different neighbors. Long-range interaction plays an essential role in determining the dynamic stability of the 2D systems. The frequency red-shift of in-plane Raman-active mode from monolayer to bulk arises mainly from the reduced long-range interaction due to the increasing screening effect.
学科主题	Physics, Multidisciplinary
语种	英语
WOS记录号	WOS:000442029300001
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80044]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Liaoning Shihua Univ, Coll Sci, Fushun 113001, Peoples R China
推荐引用方式 GB/T 7714	Hu, G,Huang, JQ,Wang, YN,et al. Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals[J]. CHINESE PHYSICS B,2018,27(8):-.
APA	Hu, G.,Huang, JQ.,Wang, YN.,Yang, T.,Dong, BJ.,...&Zhang, ZD.(2018).Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals.CHINESE PHYSICS B,27(8),-.
MLA	Hu, G,et al."Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals".CHINESE PHYSICS B 27.8(2018):-.