碳纳米管中Stone-Wales缺陷的对称性效应  

Symmetry Effects of Carbon Nanotubes by Stone-Wales Defect

作　　者：杨云青[1] 王蜀霞[1] 胡慧君[1] 饶早英[1] 牛君杰[1] 

机构地区：[1]重庆大学数理学院,重庆400044

出　　处：《重庆工学院学报》2007年第23期51-53,97,共4页Journal of Chongqing Institute of Technology

基　　金：重庆市自然科学基金资助项目(CSTC;2006BB4018)

摘　　要：采用π电子紧束缚模型,结合实空间的格林函数方法计算了(10,10),(12,0),(10,7)缺陷碳纳米管的电导和态密度,分析了Stone-Wales缺陷的对称性效应.结果表明,Stone-Wale缺陷产生了2个具有确定宇称的准束缚态,电导中的波谷和局域态密度中的波峰都是由准束缚态产生的.The symmetry effects of defect in the single-walled kinds of carbon nanotubes are discussed in this paper. The conductance and the density of states of carbon nanotubes are calculated at （ 10,10）, （ 12, 0）, （ 10, 7） based on the tighten-bind up model and the true-space Green＇ s Functions. It is indicated that two quasibound states with certain space-symmetry are produced by the Stone-Wales defect, resulting in the wave bottoms in conductance and wave peaks in local density of states.

关 键 词：碳纳米管 Stone-Wales缺陷 对称性效应 

分 类 号：O43[机械工程—光学工程]