Determination of exciton-phonon coupling elements in single-walled carbon nanotubes by Raman overtone analysis

被引：57

作者：

Shreve, Andrew P.

Haroz, Erik H.

Bachilo, Sergei M.

Weisman, R. Bruce

Tretiak, Sergei

Kilina, Svetlana

Doorn, Stephen K. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Rice Univ, Dept Chem, Houston, TX 77005 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.98.037405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Raman excitation profiles are obtained and compared for carbon nanotube radial breathing mode (RBM) fundamental and overtone vibrations for 5 specific chiralities. Fitting of the Raman excitation data is performed using Raman transform theory. The Huang-Rhys factors obtained from the modeling are directly related to the magnitude of the RBM exciton-phonon coupling element, which is shown to be in a weak coupling limit. The values of exciton-phonon coupling strengths and the possible role of revealed non-Condon effects are in agreement with quantum-chemical modeling.

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页数：4

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