Thickness and stacking geometry effects on high frequency overtone and combination Raman modes of graphene

	Thickness and stacking geometry effects on high frequency overtone and combination Raman modes of graphene
	Li D. F.; Zhan D.; Yan J. X.; Sun C. L.; Li Z. W.; Ni Z. H.; Liu L.; Shen Z. X.
	2013
发表期刊	Journal of Raman Spectroscopy
ISSN	ISBN/0377-0486
卷号	44 期号:1
摘要	We investigate two high frequency Raman overtone and combination modes of graphene named 2D' and 2D+G bands, and located at similar to 3240 and similar to 4260 cm(-1), respectively. The graphene thickness and stacking geometry effects for these two modes are systematically studied. The features of the 2D' band, which arises from intravalley double resonance, are not sensitive to the variation of thickness with single Lorentzian peak and fixed linewidth. We explain it theoretically by calculating the phonon dispersion mode in k-space and find that the flat band region of longitudinal optical phonon near G point is the mechanism leading to the 2D' band nonsplit. With the thickness increasing, the band position exhibits blueshift and the linewidth increases for the 2D + G band. With changing thickness and stacking geometry of graphene, the intensities of these two high-frequency bands show obvious different evolution compared with that of G band. Copyright (C) 2012 John Wiley & Sons, Ltd.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40904
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li D. F.,Zhan D.,Yan J. X.,et al. Thickness and stacking geometry effects on high frequency overtone and combination Raman modes of graphene[J]. Journal of Raman Spectroscopy,2013,44(1).
APA	Li D. F..,Zhan D..,Yan J. X..,Sun C. L..,Li Z. W..,...&Shen Z. X..(2013).Thickness and stacking geometry effects on high frequency overtone and combination Raman modes of graphene.Journal of Raman Spectroscopy,44(1).
MLA	Li D. F.,et al."Thickness and stacking geometry effects on high frequency overtone and combination Raman modes of graphene".Journal of Raman Spectroscopy 44.1(2013).

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