摘要
基于Landauer公式 ,研究了有限长的非公度和公度双壁碳纳米管的电子输运性顾 ,结果表明 ,双壁管的几何结构对其电子输运性质有显著的影响 :非公度的双壁碳管的电导随能量的不同 ,既可以是弹道型的 ,也可以是非弹道型的 ;由armchair管组成的公度的双壁碳管的电导随能量变化呈现快速的电导振荡 ,并且此快速振荡叠加在背景慢振荡上 ,而zigzag管组成的公度双壁管的电导随能量变化只有快速振荡、没有规则的慢振荡背景 .
Based upon the Landauer formula, we have studied electron transport properties of finite incommensurate and commensurate double-walled carbon nanotubes (DWNTs). The results obtained show that the geometrical structures of the tube may produce significant effects on their electron transport properties: Electron transport of the incommensurate DWNTs may be either ballistic or non-ballistic, depending on the energy region. The commensurate DWNTs formed by the armchair tubes may display quick and slow oscillation; however, those formed by the zigzag tubes have no regular slow oscillation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期2183-2187,共5页
Acta Physica Sinica
