Fine structure of the low-frequency Raman phonon bands of single-wall carbon nanotubes

被引:40
作者
Iliev, MN [1 ]
Litvinchuk, AP
Arepalli, S
Nikolaev, P
Scott, CD
机构
[1] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA
[2] Univ Houston, Dept Phys, Houston, TX 77204 USA
[3] Lockheed Martin, GB Tech, Houston, TX 77058 USA
[4] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA
关键词
D O I
10.1016/S0009-2614(99)01293-2
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
The Raman spectra of single-wall carbon nanotubes produced by a laser and are process were studied between 5 and 500 K. The linewidth versus temperature dependence of the low-frequency Raman bands between 150 and 200 cm(-1) deviates from that expected for phonon decay through a phonon-phonon scattering mechanism. The experimental results and their analysis provide convincing evidence that each of the low-frequency Raman bands is a superposition of several narrower Raman lines corresponding to tubes of nearly the same diameter. At low temperatures the width Delta(T) = gamma + Gamma(T) of these components is determined mainly by the temperature-independent part gamma approximate to 2 cm(-1). (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:217 / 221
页数:5
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