Resonant cavities in metallic single-wall nanotubes: Green’s function calculations

Abstract

We study the electronic transport of a metallic single-wall carbon nanotube sandwiched between two equal metallic single-wall nanotubes of different radii. We calculate the transmission function and the density of states using the Green's function method. This cavity behaves as a resonant box with quasibound states producing resonances and antiresonances in transmission. This behavior is a consequence of the different band structures for nanotubes forming the cavity.