Phonon-phonon interactions and phonon damping for the curvature modes in carbon nanotubes

被引：1

作者：

Li, Guolong ^{[1
,2
]}

Ren, Zhongzhou ^{[1
,2
,3
,4
]}

机构：

[1] Nanjing Univ, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Joint Ctr Nucl Sci & Technol, Nanjing 210093, Jiangsu, Peoples R China

[4] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China

来源：

EPL | 2016年 / 113卷 / 01期

基金：

中国国家自然科学基金;

关键词：

THERMAL-CONDUCTIVITY; ELASTIC PROPERTIES; SCATTERING; VIBRATIONS;

D O I：

10.1209/0295-5075/113/16002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We focus on the damping of the lowest-lying gapped modes with integer angular-momentum quantum number vertical bar l vertical bar = 2 in carbon nanotubes (CNTs). These modes, called C modes simply, can be predicted within the framework of the continuum elasticity theory with the curvature term. Based on the phonon-phonon interactions due to the anharmonic effect, we obtain the three-phonon coupling coefficients of different damping processes of C modes. Applying perturbation theory, we calculate relaxation rates tau(-1)(C) C and upper bounds of quality factors for the long-wavelength C modes. In addition, we display the wave vector dependence of tau(C) and show the importance of the C mode damping to thermal conductivity. Copyright (C) EPLA, 2016

引用

页数：6

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