Volume 85, Number 5, March 2009
Article Number 58005
Number of page(s) 5
Section Interdisciplinary Physics and Related Areas of Science and Technology
Published online 17 March 2009
EPL, 85 (2009) 58005
DOI: 10.1209/0295-5075/85/58005

Electron-electron interactions in graphene bilayers

S. 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