Phys. Rev. B 77, 075115 (2008) [5 pages]Renormalization group flow of quartic perturbations in graphene: Strong coupling and large- N limitsReceived 12 October 2007; published 15 February 2008 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.075115
DOI:
10.1103/PhysRevB.77.075115
PACS:
73.63.Bd, 05.10.Cc
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