Electron-electron interactions in graphene bilayersS. Viola Kusminskiy, D. K. Campbell and A. H. Castro Neto
Department of Physics, Boston University - 590 Commonwealth Ave., Boston, MA 02215, USA
received 13 December 2008; accepted in final form 11 February 2009; published March 2009
published online 17 March 2009
We study the effect of electron-electron interactions in the quasiparticle dispersion of a graphene bilayer within the Hartree-Fock-Thomas-Fermi theory by using a four-bands model. We find that the electronic fluid can be described by a non-interacting–like dispersion but with renormalized parameters. We compare our results with recent cyclotron resonance experiments in this system.
81.05.Uw - Carbon, diamond, graphite.
71.10.-w - Theories and models of many-electron systems.
51.35.+a - Mechanical properties; compressibility.
© EPLA 2009