Radial oscillations of local density of states in carbon nanotubes - art. no. 245111

By performing an analytical study of the electronic structure of metallic c arbon nanotubes, we show that the local density of states exhibits well-def ined oscillations as a function of the nanotube radius. The periods of such oscillations are obtained from size quantization effects derived from fold ing up finite graphene sheets into tubular structures. A clear analogy with the de Haas-van Alphen effect in metals is established to explain the orig in and features of such oscillations. Results of energy change calculations for impurity-doped carbon nanotubes also show the same type of oscillation s.