Abstract
We derive an approximate analytical expression for the density-of-states singularities in single-walled carbon nanotubes. Our approximation goes beyond the lowest-order, isotropic approach and yields the energy splitting for an arbitary chiral angle in metallic nanotubes. Semiconducting tubes are shown to fall into two classes and have a corresponding energy shift, which should be observable experimentally.
- Received 22 February 2000
DOI:https://doi.org/10.1103/PhysRevB.62.4273
©2000 American Physical Society