|VOLUME 92 | ISSUE 5 |
Anisotropy of graphite optical conductivity
L. A. Falkovsky
L.D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia
Laboratoire de Physique des Solides, Univ. Paris-Sud, F-91405 Orsay Cedex, France
The graphite conductivity is evaluated for frequencies between
the energy of the order of the electron-hole overlap, and
1.5 eV, the electron nearest hopping energy.
The in-plane conductivity per single atomic sheet
is close to the universal graphene conductivity
and, however, contains a singularity conditioned
by peculiarities of the electron dispersion.
The conductivity is less in the c-direction by the factor of the order
of 0.01 governed by electron hopping in this direction.