Band structures of bilayer graphene superlattices.

@article{Killi2011BandSO,
  title={Band structures of bilayer graphene superlattices.},
  author={Matthew Killi and Si Wu and Arun Paramekanti},
  journal={Physical review letters},
  year={2011},
  volume={107 8},
  pages={
          086801
        }
}
We formulate a low energy effective Hamiltonian to study superlattices in bilayer graphene (BLG) using a minimal model which supports quadratic band touching points. We show that a one dimensional (1D) periodic modulation of the chemical potential or the electric field perpendicular to the layers leads to the generation of zero-energy anisotropic massless Dirac fermions and finite energy Dirac points with tunable velocities. The electric field superlattice maps onto a coupled chain model… 
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