Geometrical structure effect on localization length of carbon nanotubes
  The localization length and density of states of carbon nanotubes are evaluated within the tight-binding approximation. By comparison with the corresponding results for the square lattice tubes, it is found that the hexagonal structure affects strongly the behaviors of the density of states and localization lengths of carbon nanotubes. 
W Q Ran, J Chang, H T Lu, Y H Su, H G Luo and T Xiang