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

Joaquín E. Drut and Dam Thanh Son
Phys. Rev. B 77, 075115 – Published 15 February 2008

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 1N 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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  • Received 12 October 2007

DOI:https://doi.org/10.1103/PhysRevB.77.075115

©2008 American Physical Society

Authors & Affiliations

Joaquín E. Drut and Dam Thanh Son

  • Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195-1550, USA

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Vol. 77, Iss. 7 — 15 February 2008

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