Graphene is the ultimately thin crystal, a purely two dimensional plane of carbon atoms arranged on a honeycomb lattice. This material has stimulated a worldwide research activity because electrons in graphene have a linear electronic dispersion and hence, behave as massless particles, similar to those encountered in high energy physics. We use optical techniques (infrared transmission/reflectivity and Raman scattering) combined with high magnetic fields to study the effects of electron-electron and of electron-phonon interactions in mono and multilayer graphene, with different stackings.

Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering

Exploring the band structure of multilayer graphene

Landau level spectroscopy of electron-electron interactions in graphene

Magneto-phonon resonance

Rhombohedral (ABC stacked) thin graphite

SU4 symmetry breaking