WIDTH OF THE FORBIDDEN GAP IN CHIRAL CARBON NANOTUBES
In the framework of the density functional theory, ab initio calculations of the electronic properties of 8 semiconductor chiral carbon nanotubes were performed. The obtained calculated values of the energy gaps Eg are surprisingly accurately described by the analytical expression given in the article for chiral carbon nanotubes. A comparison of our results with all the available experimental data was done. Overall, a good agreement is obtained between them.