Chirality-selective Raman scattering of the D mode in carbon nanotubes
Chirality-selective Raman scattering of the D mode in carbon nanotubes
复制标题
碳纳米管中 D 模式的手性选择性拉曼散射
DOI：
10.1103/physrevb.64.121407
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发表时间：
2001
影响因子：
3.7
通讯作者：
C. Thomsen
中科院分区：
文献类型：
--
作者：
J. Maultzsch;S. Reich;C. Thomsen
我们证明单壁碳纳米管中的 D 模式拉曼散射是由于双共振拉曼过程造成的。对于单个纳米管来说，D 模式频率随激发能量的异常变化甚至是预期的。位移的幅度和 D 模式频率很大程度上取决于管的直径和手性。由于碳纳米管的特殊电子结构，只有 ${(n}_{1}\ensuremath{-}{n}_{2})/3n$ 整数的管对 D 模式光谱有贡献。
We show that D-mode Raman scattering in single-walled carbon nanotubes is due to a double-resonant Raman process. The unusual shift of the D-mode frequency with excitation energy is even expected for a single nanotube. The magnitude of the shift and the D-mode frequency depend strongly on the tube's diameter and chirality. Only tubes with ${(n}_{1}\ensuremath{-}{n}_{2})/3n$ integer contribute to the D-mode spectrum because of the particular electronic structure of carbon nanotubes.