The electronic structure of a deformed chiral carbon nanotorus

Abstract

The electronic structure as a function of the chirality and deformations for various carbon nanotori is theoretically investigated by the tight-binding method. It has been found that for the various metallic tori the deformation-dependent energy gap displays almost the same changing features versus the deformations, whereas for the various semiconducting tori the deformation-dependent energy gap does not show the distinctive regularity associated with the deformed parameters and geometric parameters, but if the deformed parameters have some particular values the energy gap would be narrowed and even approach zero, causing the semiconducting torus to be quasi-metallic. Under the circumstances of tanα = 0 and εL = εJ, the electronic structure seems to be very insensitive to the existence of deformations.