在小的轴向拉伸下，扶手椅型碳纳米管仍然是良好的导体，但其费米波矢、费米点及费米面处的有效质量都发生了变化。
It is found that under little axial strain, armchair carbon nanotubes are still conductors, but Fermi wave vector, Fermi dot and the effective mass near Fermi face are changed.
用半经验的AM1和PM 3方法，对不同长度的扶手椅型单壁碳纳米管(3,3)进行了理论研究。
Armchair single walled carbon nanotubes (3, 3) with different lengths were studied by AM1 and PM3 methods.
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