Effect of weak impurities on electronic properties of graphene: Functional renormalization-group analysis

A. Katanin

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We consider an effect of weak impurities on the electronic properties of graphene within the functional renormalization-group approach. The energy dependences of the electronic self-energy and density of states near the neutrality point are discussed. Depending on the symmetry of the impurities, the electronic damping Γ and density of states ρ can deviate substantially from those given by the self-consistent Born approximation. We investigate the crossover from the results of the self-consistent Born approximation, which are valid far from the neutrality point to the strong-coupling (diffusive) regime near the neutrality point. For impurities, which are diagonal in both valley and sublattice indices, we obtain a finite density of states at the Fermi level with values which are much bigger than the result of the self-consistent Born approximation.

Original languageEnglish
Article number241401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number24
DOIs
Publication statusPublished - 2 Dec 2013
Externally publishedYes

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