摘要
运用第一性原理的密度泛函理论结合非平衡格林函数研究了含有五边形—七边形拓扑缺陷的纳米碳管异质结的输运性质.结果发现拓扑缺陷对碳管的输运性质有很大影响;另外,不同类型的碳管形成的异质结的输运性质也有明显的差异.
Using the density-functional theory in combination with nonequilibrium Green' s function technique, we studied the densities of states and transport properties of the(7,0)--(8,0) and(8,0)--(9,0) single-wall carbon-nanotube heterojunctions containing one pentagon-heptagon-pair (5/7) topological defect. The result suggests that the effect of pentagon-heptagon-pairs (5/7) topological defects on carbon nanotubes is remarkable. In addition, the heterojunctions constituted by different types of carbon nanotubes also have different characteristics.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期4822-4827,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:50372018)
湖南省自然科学基金(批准号:02JJY2013)资助的课题.~~
关键词
纳米碳管
输运性质
异质结
透射系数
carbon nanotube, transport properties, heterojuction, transmission coefficient