Phonon spectrum of single-walled boron nitride nanotubes

• 来源期刊: 中国物理（英文版）
• 关键词: phonon spectrum nanotube boron nitride
• 年，卷（期）: 2004,（9）
• 页码范围: 1526-1530
• 页数: 5页
• 语种: 英文

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.