Electronic and transport properties of achiral carbon nanotubes with di-vacancy pairs

Abstract

The transport behaviors of achiral single walled carbon nanotubes (SWNTs) with two di-vacancies have been investigated using a tight-binding model. The obtained results indicate that the number and position of the resonant conductance are related to the longitudinal inter-vacancy distance, and the conductance spectra are very different for different di-vacancy configurations. It is also found that the di-vacancy’s lateral distribution has a drastic effect on the SWNT’s transport behaviors. A 2π/n rotation invariance exists in the (10,10) armchair SWNT, and instead the 3·2π/n one for the (18,0) zigzag SWNT. Furthermore, our obtained results can give a good estimate of the transport behaviors of the metallic SWNTs with a number of di-vacancies.