An atlas of carbon nanotube optical transitions

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	An atlas of carbon nanotube optical transitions
	Liu, KH ; Deslippe, J ; Xiao, FJ ; Capaz, RB ; Hong, XP ; Aloni, S ; Zettl, A ; Wang, WL ; Bai, XD ; Louie, SG ; Wang, EG ; Wang, F
刊名	NATURE NANOTECHNOLOGY
	2012
卷号	7 期号:5 页码:325
关键词	EXCITONS GRAPHENE
ISSN号	1748-3387
通讯作者	Wang, F: Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
中文摘要	Electron-electron interactions are significantly enhanced in one-dimensional systems(1), and single-walled carbon nanotubes provide a unique opportunity for studying such interactions and the related many-body effects in one dimension(2-4). However, single-walled nanotubes can have a wide range of diameters and hundreds of different structures, each defined by its chiral index (n,m)(5,6), where n and m are integers that can have values from zero up to 30 or more. Moreover, one-third of these structures are metals and two-thirds are semiconductors, and they display optical resonances at many different frequencies. Systematic studies of many-body effects in nanotubes would therefore benefit from the availability of a technique for identifying the chiral index of a nanotube based on a measurement of its optical resonances, and vice versa. Here, we report the establishment of a structure-property 'atlas' for nanotube optical transitions based on simultaneous electron diffraction measurements of the chiral index and Rayleigh scattering measurements of the optical resonances(7,8) of 206 different single-walled nanotube structures. The nanotubes, which were suspended across open slit structures on silicon substrates, had diameters in the range 1.3-4.7 nm. We also use this atlas as a starting point for a systematic study of many-body effects in the excited states of single-walled nanotubes(9-16). We find that electron-electron interactions shift the optical resonance energies by the same amount for both metallic and semiconducting nanotubes, and that this shift (which corresponds to an effective Fermi velocity renormalization) increases monotonically with nanotube diameter. This behaviour arises from two sources: an intriguing cancellation of long-range electron-electron interaction effects, and the dependence of short-range electronelectron interactions on diameter(10,11).
收录类别	SCI
资助信息	US National Science Foundation (NSF) [0846648, DMR10-1006184, EEC-0832819]; US Department of Energy (DOE) [DE-AC02-05CH11231]; National Natural Science Foundation of China [91021007, 10874218, 10974238, 20973195, 50725209]; Chinese Ministry of Science and Technology [2009DFA01290]; CNPq; FAPERJ; INCT - Nanomateriais de Carbono
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33627]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, KH,Deslippe, J,Xiao, FJ,et al. An atlas of carbon nanotube optical transitions[J]. NATURE NANOTECHNOLOGY,2012,7(5):325.
APA	Liu, KH.,Deslippe, J.,Xiao, FJ.,Capaz, RB.,Hong, XP.,...&Wang, F.(2012).An atlas of carbon nanotube optical transitions.NATURE NANOTECHNOLOGY,7(5),325.
MLA	Liu, KH,et al."An atlas of carbon nanotube optical transitions".NATURE NANOTECHNOLOGY 7.5(2012):325.