Survival of the Dirac points in rippled graphene

Details Survival of the Dirac points in rippled graphene Survival of the Dirac points in rippled graphene

2008-03-31

arxiv.org/abs/0804.0013v1

Phys. Rev. Lett. 100, 256405 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.256405

We study the effects of the rippling of the graphene sheet on the quasiparticle dispersion. This is achieved using a generalization to the honeycomb lattice of the Momentum Average approximation, which is accurate for all coupling strengths and at all energies. We show that even though the position of the Dirac points may move and the Fermi speed can be renormalized significantly, quasiparticles with very long lifetimes survive near the Dirac points even for very strong couplings.

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