Three-phonon Umklapp process in zigzag single-walled carbon nanotubes
Three-phonon Umklapp process in zigzag single-walled carbon nanotubes
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DOI：
10.1088/0953-8984/15/23/101
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发表时间：
2003-06
期刊：
影响因子：
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通讯作者：
Y. Xiao;X. H. Yan;J. Cao;J. Ding
中科院分区：
文献类型：
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作者：
Y. Xiao;X. H. Yan;J. Cao;J. Ding
考虑三声子Umclapp过程，计算了锯齿形单壁碳纳米管的驰豫速率。结果表明，在低频段，弛豫速率随声子频率呈指数增加。得到了弛豫速率与温度的线性关系。结果表明，声子平均自由程达到了几个微米，这与估算的实验结果相一致。
The rate of relaxation of zigzag single-walled carbon nanotubes is calculated by consideration of three-phonon Umklapp process. The results show that the relaxation rate increases exponentially with phonon frequency at low frequency. The linear dependence of the relaxation rate on temperature is obtained. It is shown that the value of the phonon mean free path reaches a few micrometres, which is consistent with the estimated experimental result.