2003/11/26 by Seiji Uryu · 1 citation
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Graphene research and applications #Semiconductor materials and interfaces #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.69.075402
24 pages, 13 figures, to be published in Physical Review B
arxiv created 2003/11/26 · openalex publication_date 2004/02/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The 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=e2/\ensuremathπ\ensuremath\Elzxh, near the Fermi energy.