Quantum magneto-optics of graphite with trigonal warping

The optical conductivity of graphite in quantizing magnetic fields is studied. Both the dynamical conductivities, longitudinal as well as Hall's, are analytically evaluated. The conductivity peaks are explained in terms of electron transitions. We have shown that the trigonal warping in graphite can be considered within the perturbation theory at strong magnetic fields larger than approximately 1 T. The main optical transitions obey the selection rule with Δn=1 for the Landau number n, however, the Δn=2 transitions due to the trigonal warping with small probability are also essential. The Kerr rotation and reflectivity in graphite in the quantizing magnetic fields are calculated. Parameters of the Slonczewski-Weiss-McClure model are used in the fit taking into account the previous dHvA measurements and correcting some of them for the case of strong magnetic fields.