Phase diagrams of the metallic zigzag carbon nanotube
| dc.creator | Bunder, J. E. | |
| dc.creator | Lin, Hsiu-Hau | |
| dc.date | 2008-03-21 | |
| dc.date | 2008-07-02 | |
| dc.date.accessioned | 2026-07-07T09:47:48Z | |
| dc.date.available | 2026-07-07T09:47:48Z | |
| dc.description | We investigate a metallic zigzag carbon nanotube by means of a Hubbard model which includes both on-site and nearest neighbour interactions. Assuming weak interactions, a renormalization group analysis of the equivalent two-leg ladder followed by bosonization and refermionization results in a Gross-Neveu model with an enlarged symmetry relative to the original Hamiltonian. For the undoped case the symmetry of the Gross-Neveu model is SO(8), but for the doped case the particle-hole symmetry is broken and the symmetry reduces to SO(6). Four ground state phases are found in the undoped carbon nanotube with repulsive interactions, a d-wave Mott insulator, an s-wave Mott insulator, a p-density wave and a charge density wave. The doped case has two ground state phases, a d-wave superconductor and a phase where a p-density wave and a charge density wave co-exist. We also explore the global phase diagram with a general interaction profile and find several additional states, including a chiral current phase where current flows around the nanotube along the zigzag bonds. | |
| dc.description | 16 pages, 9 figures | |
| dc.identifier | https://arxiv.org/abs/0803.3107 | |
| dc.identifier | http://arxiv.org/abs/0803.3107 | |
| dc.identifier | PRB, Vol.78, No.3, 035401 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.035401 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/163978 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Phase diagrams of the metallic zigzag carbon nanotube | |
| dc.type | text |