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 ϕ0(=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.
@article{arxiv.cond-mat/0005070,
title = {Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes},
author = {S. Roche and G. Dresselhaus and M. S. Dresselhaus and R. Saito},
journal= {arXiv preprint arXiv:cond-mat/0005070},
year = {2009}
}
Comments
22 pages, 6 Postscript figures. submitted to Phys. Rev. B