Resonant Raman spectra of carbon nanotube bundles observed by perpendicularly polarized light

被引：21

作者：

Grüneis, A

Saito, R

Jiang, J

Samsonidze, GG

Pimenta, MA

Jorio, A

Souza, AG

Dresselhaus, G

Dresselhaus, MS

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] CREST, JST, Sendai, Miyagi 9808578, Japan

[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, Cambridge, MA 02139 USA

[5] MIT, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA

[6] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

[7] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 387卷 / 4-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2004.02.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We calculated the resonance condition for the radial breathing Raman mode for single wall carbon nanotube (SWNT) bundles for light polarization parallel and perpendicular to the tube axis. The radial breathing modes that are not observed in isolated SWNTs, but are observed in SWNT bundles, are assigned to a resonance process for light with perpendicular polarization. Asymmetry between the valence and conduction pi energy bands becomes essential for obtaining resonance conditions. We find that due to a high joint density of states, armchair SWNTs have the largest optical transition intensities. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：301 / 306

页数：6

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