Pressure‐ and orientation‐dependent linear optical absorption spectra of radially deformed single‐walled carbon nanotubes
Pressure‐ and orientation‐dependent linear optical absorption spectra of radially deformed single‐walled carbon nanotubes
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径向变形单壁碳纳米管的压力和方向相关的线性光学吸收光谱
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
H. Lu
中科院分区：
文献类型：
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作者：
G. Liu;X. Wang;J. Chen;H. Lu
基于Slater Koster紧束缚模型和梯度近似，研究了径向变形单壁碳纳米管（SWNTs）的线性光学性质.研究发现，对于扶手椅型管，径向压力可以使理想管中的吸收峰向低能方向移动并最终消失，这与实验结果一致.此外，在径向变形管的光谱中还出现了许多新的、与压力和取向有关的吸收峰。最后，为了比较，简单地讨论了变形管的光学性质与手征性的关系。（© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Based upon the Slater–Koster tight‐binding model and the gradient approximation, we investigate the linear optical properties of radially deformed single‐walled carbon nanotubes (SWNTs). It is found that, for the armchair tubes, the radial pressure may make the absorption peaks exhibited in the perfect tube shift to lower energy and eventually vanish, which is consistent with the experimental results observed in the optical spectra of squashed SWNT films. In addition, a lot of new and pressure‐ and orientation‐dependent absorption peaks emerge in the optical spectra of the radially deformed tubes. Finally, for comparison, the dependence of optical properties of deformed tubes on chirality is discussed simply. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)