Electronic properties of graphene multilayers

Details Electronic properties of graphene multilayers Electronic properties of graphene multilayers

2006-04-04

arxiv.org/abs/cond-mat/0604106v2

Phys. Rev. Lett. 97, 266801 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figure. Reference to exciting new ARPES results on graphite added (we thank A. Lanzara for sharing the paper prior

Scientific paper

We study the effects of disorder in the electronic properties of graphene multilayers, with special focus on the bilayer and the infinite stack. At low energies and long wavelengths, the electronic self-energies and density of states exhibit behavior with divergences near half-filling. As a consequence, the spectral functions and conductivities do not follow Landau's Fermi liquid theory. In particular, we show that the quasiparticle decay rate has a minimum as a function of energy, there is a universal minimum value for the in-plane conductivity of order e^2/h per plane and, unexpectedly, the c-axis conductivity is enhanced by disorder at low doping, leading to an enormous conductivity anisotropy at low temperatures.

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