中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1526-1530.doi: 10.1088/1009-1963/13/9/028

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Phonon spectrum of single-walled boron nitride nanotubes

肖杨1, 毛宇亮1, 向君1, 颜晓红2, 曹觉先2   

  1. (1)Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China; (2)Department of Physics & Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China; Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-12-02 修回日期:2004-04-29 出版日期:2004-06-21 发布日期:2005-06-21
  • 基金资助:
    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

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   

  1. 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
  • Received:2003-12-02 Revised:2004-04-29 Online:2004-06-21 Published:2005-06-21
  • Supported by:
    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

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摘要： 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.

关键词: phonon spectrum, nanotube, boron nitride

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.

Key words: phonon spectrum, nanotube, boron nitride

中图分类号:  (Phonons or vibrational states in low-dimensional structures and nanoscale materials)

  • 63.22.-m
78.30.Fs (III-V and II-VI semiconductors)