Tight-binding electronic band structure calculation studies of periodically perturbed (n,n) carbon nanotubes

초록

Tight-binding electronic band structure calculations on perturbed (n,n) carbon nanotubes have been performed. Our study shows that periodic local perturbations influence the electronic band structures of (n,n) carbon nanotubes in different ways depending on the symmetry of the perturbation. We focus on reflect ion-symmetry-breaking local perturbations and analyze possible band crossings at the Fermi level at the Gamma point in small-radius (n,n) carbon nanotubes with selected spatial periods. We find perturbations on the order of 1 eV are required to cause the nanotube to be metallic in the presence of the perturbations. This finding provides valuable information regarding sensor and electronic-device applications of perturbed (n,n) carbon nanotubes.

키워드