Unusual electronic behavior in graphene multi-layers

Antonio Castro Neto

Physics Department, Boston University, Boston, USA

We study the problem of electronic transport in graphene multilayers taking into account disorder scattering. We find that the electronic behavior of multi-layer deviates strongly from Landau Fermi liquid theory. We show that unitary scattering, treated in a self-consistent way, produces divergences in the electronic density of states leading to short quasiparticle lifetimes and large broadening of angle resolved photoemission (ARPES) lines. We show that the out-of-plane transport is enhanced by disorder in neutral graphene and that the anisotropy ratio between in-plane and out-of-plane transport is huge at low temperatures. These properties characterize graphene multi-layers in a different class of (chiral) systems where Landau's Fermi liquid theory is violated.