Effects of Topological Defects on Carbon Nanotube
拓扑缺陷对碳纳米管电学性能的影响

Using the extended Su-Schriffer-Heeger model,in real space,we calculate the electronic structure and charge density of three systems,(9,0)-(8,0),(9,0)-(7,0) and (9,0)-(6,0),which are achieved by introducing topological defects (5/7) ,(5/6/7),and (5/6/6/7) in the perfect hexagonal network of the zigzag carbon nanotube configuration.At the same time,the results of these different systems are compared.The results show that the different arrangements of pentagons and heptagons along the axis cause obvious differences on the electrical properties of the carbon nanotube.So,different electronic devices based on these heterojunctions can be created.