Longitudinal Optical Phonons in Metallic and Semiconducting Carbon Nanotubes

被引：62

作者：

Fouquet, Martin ^{[1
]}

Telg, Hagen ^{[1
]}

Maultzsch, Janina ^{[1
,2
,3
]}

Wu, Yang ^{[2
,3
]}

Chandra, Bhupesh ^{[4
]}

Hone, J. ^{[4
]}

Heinz, Tony F. ^{[2
,3
]}

Thomsen, C. ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[3] Columbia Univ, Dept Phys, New York, NY 10027 USA

[4] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 07期

基金：

美国国家科学基金会;

关键词：

Yarn;

D O I：

10.1103/PhysRevLett.102.075501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the high-energy Raman modes, G(+) and G(-), in a pair of one metallic and one semiconducting nanotubes. By combining Rayleigh scattering with Raman resonance profiles of the radial breathing mode and the high-energy modes, we show that the observed G(-) and G(+) peaks can originate from longitudinal optical phonons of different tubes. The G(-) peak is the longitudinal mode of the metallic tube; it is broadened and downshifted due to strong electron-phonon coupling in the metallic nanotube. The G(+) peak is due to the longitudinal mode in the semiconducting tube. This result resolves an ongoing debate in the literature.

引用

页数：4

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