Electron-electron interactions in decoupled graphene layers

Details Electron-electron interactions in decoupled graphene layers Electron-electron interactions in decoupled graphene layers

2010-04-25

arxiv.org/abs/1004.4335v1

Phys. Rev. B 82, 085443 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 4 figures, submitted

Scientific paper

10.1103/PhysRevB.82.085443

Multi-layer graphene on the carbon face of silicon carbide is an intriguing electronic system which typically consists of a stack of ten or more layers. Rotational stacking faults in this system dramatically reduce inter-layer coherence. In this article we report on the influence of inter-layer interactions, which remain strong even when coherence is negligible, on the Fermi liquid properties of charged graphene layers. We find that inter-layer interactions increase the magnitudes of correlation energies and decrease quasiparticle velocities, even when remote-layer carrier densities are small, and that they lessen the influence of exchange and correlation on the distribution of carriers across layers.

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