Phonon spectrum of single-walled boron nitride nanotubes
Xiao Yang (肖杨)a, Yan Xiao-Hong (颜晓红)ab, Cao Jue-Xian (曹觉先)ab, Mao Yu-Liang (毛宇亮)a, Xiang Jun (向君)a
a Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China; b Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract Based on a force constant model, we investigated the phonon spectrum and then specific heat of single-walled boron nitride nanotubes. The results show that the frequencies of Raman and infrared active modes decrease with increasing diameter in the low frequency, which is consistent with the results calculated by density functional theory. The fitting formulae for diameter and chirality dependence of specific heat at 300K are given.
Received: 02 December 2003
Revised: 29 April 2004
Accepted manuscript online:
PACS:
63.22.-m
(Phonons or vibrational states in low-dimensional structures and nanoscale materials)
Fund: Project supported by Science and Technology Foundation for Ministry of Education (Grant No 204099) and by the Science and Technology Foundation for Education Bureau of Hunan Province (Grant No 03A046), and partly by the Natural Science Foundation of Hunan
Cite this article:
Xiao Yang (肖杨), Yan Xiao-Hong (颜晓红), Cao Jue-Xian (曹觉先), Mao Yu-Liang (毛宇亮), Xiang Jun (向君) Phonon spectrum of single-walled boron nitride nanotubes 2004 Chinese Physics 13 1526
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