Thickness effects on the quantum conductance of single wall carbon nanotube junctions

This research aims to investigate the influence of the tube thickness in the zigzag-semiconductor carbon nanotube junction on the quantum conductance using the tight binding model and the Green's function technique. The conductance of (12,0)/(6,6) carbon nanotube junction decreases with the thickness of the tube. However, the conductance behavior of (10,0)/(5,5) depends on the thickness of each part. These junctions could be used as the building blocks of nanoscale diodes.

► Thickness effect is investigated on the conductance of finite carbon nanotubes.
► All zigzag finite carbon nanotubes are metal at the Fermi energy.
► The conductance of finite armchair nanotubes depends on its thickness.
► The conductance of (12,0)/(6,6) decreases by increasing the junction thickness.
► The conductivity of (10,0)/(5,5) depends on the component which increases.