ELECTRONIC STRUCTURE OF METALLIC SINGLE-WALL CARBON NANOTUBES: TIGHT-BINDING VERSUS FREE-ELECTRON APPROXIMATION

摘要

For metallic single-wall carbon nanotubes the free-electron model of electronic structure with finite thickness of the c onducting shell is proposed. The band s tructure calculations in the frame of this model of armchair (n,n) nanotubes (for n = 5-10) show essential similarity with tight-binding description.