Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes

Abstract

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 ${\varphi }_0(=hc/e)$-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.

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

References in corpus (4)

• Electronic Density of States of Atomically Resolved Single-Walled Carbon Nanotubes: Van Hove Singularities and End States
• Conductance of carbon nanotubes with disorder: A numerical study
• Effects of magnetic field and disorder on electronic properties of Carbon Nanotubes
• Electronic states of metallic and semiconducting carbon nanotubes with bond and site disorder

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