Magnetoelectronic properties of chiral carbon nanotubes and tori

Abstract

Magnetoelectronic properties of chiral carbon nanotubes and toroids are studied for anymagnetic field. They are sensitive to the changes in the magnitude and the direction of themagnetic field, as well as the chirality. The important differences between chiral andachiral carbon nanotubes include band symmetry, band curvature, band crossing,band-edge state, state degeneracy, band spacing, energy gap, and semiconductor–metaltransition. Carbon tori also exhibit the strong chirality dependence on the fieldmodulation of discrete states. Chiral carbon tori might differ from chiral carbonnanotubes in energy-gap modulation, density of states, and state degeneracy.