Chirality-dependent G-band Raman intensity of carbon nanotubes
Chirality-dependent G-band Raman intensity of carbon nanotubes
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DOI：
10.1103/physrevb.64.085312
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发表时间：
2001-03
影响因子：
3.7
通讯作者：
R. Saito;A. Jorio;M. Hunter;T. McClure;G. Dresselhaus;M. Dresselhaus;J. Hafner;Charles M. Lieber
中科院分区：
文献类型：
--
作者：
R. Saito;A. Jorio;M. Hunter;T. McClure;G. Dresselhaus;M. Dresselhaus;J. Hafner;Charles M. Lieber
使用拉曼张量的非共振理论计算单壁碳纳米管的手性相关 G 带拉曼强度。对于手性或非手性纳米管，我们分别获得了六种或三种强拉曼模式，其相对强度取决于纳米管的手性角。二维石墨中的纵向和横向光学声子模式分别变成一维纳米管中的横向和纵向光学声子模式。单个单壁碳纳米管的共焦显微拉曼测量显示了 G 带强度的手性相关光谱，正如该理论所预测的那样。
The chirality-dependent G-band Raman intensity of single wall carbon nanotubes is calculated using a nonresonant theory for the Raman tensor. We obtain six or three intense Raman modes, respectively, for chiral or achiral nanotubes, whose relative intensities depend on the chiral angle of the nanotube. The longitudinal and transverse optical phonon modes in two-dimensional graphite become, respectively, transverse and longitudinal optical phonon modes in a one-dimensional nanotube. Confocal micro-Raman measurements of individual single wall carbon nanotubes show chirality-dependent spectra of the G-band intensity, as predicted by this theory.