Electronic states and quantum transport in double-wall carbon nanotubes

Abstract

Electronic states and transport properties of double-wall carbon nanotubes without impurities are studied in a systematic manner. It is revealed that scattering in the bulk is negligible and the number of channels determines the average conductance. In the case of general incommensurate tubes, separation of degenerated energy levels due to intertube transfer is suppressed in the energy region higher than the Fermi energy but not in the energy region lower than that. Accordingly, in the former case, there are few effects of intertube transfer on the conductance, while in the latter case, separation of degenerated energy levels leads to large reduction of the conductance. It is also found that in some cases antiresonance with edge states in inner tubes causes an anomalous conductance quantization, $G=e^2/\pi \hslash$, near the Fermi energy.

arXiv comment24 pages, 13 figures, to be published in Physical Review B

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• Quantum transport in a multiwalled carbon nanotube
• Fractional quantum conductance in carbon nanotubes
• Quantum Conductance Steps in Solutions of Multiwalled Carbon Nanotubes
• Electronic structure of polychiral carbon nanotubes
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• The Single-Particle density of States, Bound States, Phase-Shift Flip, and a Resonance in the Presence of an Aharonov-Bohm Potential

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