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 lowenegy 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
 EPrint:
 10 pages, 6 figures. Replaced with published version