Breathinglike phonon modes of multiwalled carbon nanotubes
Breathinglike phonon modes of multiwalled carbon nanotubes
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DOI：
10.1103/physrevb.65.235415
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发表时间：
2002-05
影响因子：
3.7
通讯作者：
V. Popov;L. Henrard
中科院分区：
文献类型：
--
作者：
V. Popov;L. Henrard
本文用价力场模型研究了多壁碳纳米管的类呼吸声子模，对于两层和三层扶手椅型碳纳米管，用连续介质模型研究了多层碳纳米管的类呼吸声子模。用键极化率模型计算了类呼吸模式的非共振拉曼强度。结果表明，在给定的多壁管的所有类呼吸模态中，同相模态的强度最大。的呼吸模式的预测强度进行比较，可用的低频实验拉曼数据。特别注意与双壁碳纳米管的拉曼数据的比较。
The breathinglike phonon modes of multiwalled carbon nanotubes are studied within a valence force field model for nanotubes with two and three layers of armchair type and within a continuum model for nanotubes with a large number of layers. A bond-polarizability model is used to calculate the nonresonant Raman intensity of the breathinglike modes. It is obtained that among all breathinglike modes of a given multiwalled tube, the in-phase one has a maximal intensity. The predicted intensity of the breathinglike modes is compared to available low-frequency experimental Raman data. Special attention is given to the comparison with Raman data on double-walled carbon nanotubes.