Band gaps of primary metallic carbon nanotubes
Abstract
Primary metallic or small-gap semiconducting nanotubes are tubes with band gaps that arise solely from breaking the bond symmetry due to curvature. We derive an analytic expression for these gaps by considering how a general symmetry breaking opens a gap in nanotubes with a well-defined chiral wrapping vector. This approach provides a straightforward way to include all types of symmetry-breaking effects, resulting in a simple unified gap equation as a function of chirality and deformations.
- Publication:
-
Physical Review B
- Pub Date:
- February 2001
- DOI:
- 10.1103/PhysRevB.63.073408
- arXiv:
- arXiv:cond-mat/0007244
- Bibcode:
- 2001PhRvB..63g3408K
- Keywords:
-
- 73.61.Wp;
- 71.20.Tx;
- 61.48.+c;
- Fullerenes and related materials;
- intercalation compounds;
- Fullerenes and fullerene-related materials;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- Final published version. Four pages in revtex format including one epsf-embedded figure. The latest version in PDF format is available from http://fy.chalmers.se/~eggert/papers/nanodeform.pdf