The transport properties and related electronic structure of a single-walled armchair carbon nanotube with two substitutional defects were studied within the π-electron tight-binding model. It was found that the conductance and the local density of states were strongly dependent upon the symmetry and relative separation of the two defects. The effects of defect strength and nanotube size upon the conductance were also considered.

Symmetry Effect on the Conductance of Two-Defect Carbon Nanotubes. H.F.Song, J.L.Zhu, J.J.Xiong: Physical Review B, 2002, 65[8], 854081-6