Abstract
Single-wall carbon nanotubes with on-site interaction are studied by a controlled renormalization group method. When formulated as a system of flavors of interacting Dirac fermions, the effective model at generic filling resembles a set of quasi-1D Hubbard chains. For the undoped armchair and the zigzag with specific mappings to the two-chain Hubbard model at half filling with effective interaction and are found from this more general equivalence. The phase diagrams of the (3,3) armchair and the zigzag at generic fillings are studied and compared as an example.
- Received 16 September 1997
DOI:https://doi.org/10.1103/PhysRevB.58.4963
©1998 American Physical Society