Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes

Details Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes

2000-05-03

arxiv.org/abs/cond-mat/0005070v1

Physics

Condensed Matter

22 pages, 6 Postscript figures. submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.62.16092

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.

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