Renormalization group flow of quartic perturbations in graphene: Strong coupling and large- N limits
Abstract
We explore the renormalization group flow of quartic perturbations in the low-enegy theory of graphene, in the strong Coulomb coupling and large- N limits, where N is the number of fermion flavors. We compute the anomalous dimensions of the quartic couplings u up to leading order in 1/N and find both relevant and irrelevant directions in the space of quartic couplings. We discuss possible phase diagrams and relevance for the physics of graphene.
- Publication:
-
Physical Review B
- Pub Date:
- February 2008
- DOI:
- 10.1103/PhysRevB.77.075115
- arXiv:
- arXiv:0710.1315
- Bibcode:
- 2008PhRvB..77g5115D
- Keywords:
-
- 73.63.Bd;
- 05.10.Cc;
- Nanocrystalline materials;
- Renormalization group methods;
- Condensed Matter - Strongly Correlated Electrons;
- High Energy Physics - Theory
- E-Print:
- 10 pages, 6 figures. Replaced with published version