Aharonov-Bohm spectral features and coherence lengths in carbon   nanotubes
  The electronic properties of carbon nanotubes are investigated in the presence of disorder and a magnetic field parallel or perpendicular to the nanotube axis. In the parallel field geometry, the $\phi_{0}(=hc/e)$-periodic metal-insulator transition (MIT) induced in metallic or semiconducting nanotubes is shown to be related to a chirality-dependent shifting of the energy of the van Hove singularities (VHSs). The effect of disorder on this magnetic field-related mechanism is considered with a discussion of mean free paths, localization lengths and magnetic dephasing rate in the context of recent experiments. 
S. Roche (Univ. Valladolid, Spain), G. Dresselhaus (MIT), M. S.   Dresselhaus(MIT), and R. Saito (Univ. Electro-Communicatio...