Origin of the fine structure of the Raman D band in single-wall carbon nanotubes -: art. no. 157401

被引：50
|
作者：
Zólyomi, V
Kürti, J
Grüneis, A
Kuzmany, H
机构：
[1] Eotvos Univ Budapest, Dept Biol Phys, H-1117 Budapest, Hungary
[2] Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.90.157401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Experiments show that the D bands of bundles of single wall carbon nanotubes have a fine structure, apparently consisting of more than one subband. Using the double resonance theory, we calculate for the first time the D band for a sample of a given diameter distribution for seven different laser excitation energies in a wide range. In addition, a detailed theoretical explanation for the fine structure of the D band is provided. The calculated results agree well with experiments and show that the main factors in determining the fine structure are an enhanced trigonal warping of the phonon dispersion, the presence of a diameter distribution in the sample, and-most importantly-the resonance from the Van Hove singularities.
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页数：4
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