Observation of Low-Frequency Combination and Overtone Raman Modes in   Misoriented Graphene

doi:10.1021/jp411573c

CORC > 北京大学 > 信息科学技术学院

	Observation of Low-Frequency Combination and Overtone Raman Modes in Misoriented Graphene
	Wu, Juanxia ; Xu, Hua ; Mu, Weihua ; Xie, Liming ; Ling, Xi ; Kong, Jin ; Dresselhaus, Mildred S. ; Zhang, Jin
刊名	journal of physical chemistry c
	2014
关键词	TWISTED BILAYER GRAPHENE CARBON NANOTUBES SPECTROSCOPY SCATTERING GRAPHITE SUPERLATTICES EDGES
DOI	10.1021/jp411573c
英文摘要	Stacking disorder will significantly modify the optical properties and interlayer coupling stretch of few-layer graphene. Here, we report the observation of the Raman breathing modes in the low-frequency range of 100-200 cm(-1) in misoriented few-layer graphene on a SiO2/Si substrate. Two dominant Raman modes are identified. The one at similar to 120 cm(-1) is assigned as the E-g + ZO' combination mode of the in-plane shear and the out-of-plane interlayer optical phonon breathing modes. Another peak at similar to 182 cm(-1) is identified as the overtone mode 2ZO'. The appearance of these Raman modes for different twist angles indicates that stacking disorder in few-layer graphene significantly alters the Raman feature, especially for those combination modes containing the interlayer breathing mode. Further investigation shows that the two Raman vibrational modes (similar to 120 and similar to 182 cm(-1)) are strongly coupled to the excitation laser energy, but their frequencies are independent of the number of graphene layers before folding. The present work provides a sensitive way to study the phonon dispersion, electron-phonon interaction, and electronic band structure of misoriented graphene layers.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000331861700030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; 3; ARTICLE; muwh@itp.ac.cn; jinzhang@pku.edu.cn; 7; 3636-3643; 118
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/164110]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wu, Juanxia,Xu, Hua,Mu, Weihua,et al. Observation of Low-Frequency Combination and Overtone Raman Modes in Misoriented Graphene[J]. journal of physical chemistry c,2014.
APA	Wu, Juanxia.,Xu, Hua.,Mu, Weihua.,Xie, Liming.,Ling, Xi.,...&Zhang, Jin.(2014).Observation of Low-Frequency Combination and Overtone Raman Modes in Misoriented Graphene.journal of physical chemistry c.
MLA	Wu, Juanxia,et al."Observation of Low-Frequency Combination and Overtone Raman Modes in Misoriented Graphene".journal of physical chemistry c (2014).