Physics – Condensed Matter – Materials Science
Scientific paper
2011-06-17
Physics
Condensed Matter
Materials Science
6 pages, 4 figures
Scientific paper
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 the strong magnetic field larger than 1 T approximately. The main optical transitions obey the selection rule with $\Delta n=1$ for the Landau number $n$, however the $\Delta n=2$ transitions due to the trigonal warping with the 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 the strong magnetic fields.
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