Effects of flavor-symmetry violation from staggered fermion lattice simulations of graphene

Details Effects of flavor-symmetry violation from staggered fermion lattice simulations of graphene Effects of flavor-symmetry violation from staggered fermion lattice simulations of graphene

2009-11-23

arxiv.org/abs/0911.4316v3

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 5 figures; v2. added results for noncompact gauge action; v3. added results for stout smearing, corrected rescaling o

Scientific paper

We analyze the effects of flavor splitting from staggered fermion lattice simulations of graphene. Both the unimproved action, and the tadpole improved action with a Naik term show significant flavor symmetry breaking in the spectrum of the Dirac operator. We also measure the average plaquette term and describe how it calls for a reinterpretation of previous lattice Monte Carlo simulation results, due to tadpole improvement. From this we infer that the simulations are indicative of a semi-metal phase for suspended graphene.

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