Renormalization group flow of quartic perturbations in graphene: Strong coupling and large-N limits

Details Renormalization group flow of quartic perturbations in graphene: Strong coupling and large-N limits Renormalization group flow of quartic perturbations in graphene: Strong coupling and large-N limits

2007-10-05

arxiv.org/abs/0710.1315v2

Phys. Rev. B 77, 075115 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 6 figures. Replaced with published version

Scientific paper

10.1103/PhysRevB.77.075115

We explore the renormalization group flow of quartic perturbations in the low-energy 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 next-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.

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