Infrared phonon activity in pristine graphite
arXiv:1205.4907 · doi:10.1103/PhysRevB.86.054302
Abstract
We study experimentally and theoretically the Fano-shaped phonon peak at 1590 cm$^{-1}$ (0.2 eV) in the in-plane optical conductivity of pristine graphite. We show that the anomalously large spectral weight and the Fano asymmetry of the peak can be qualitatively accounted for by a charged-phonon theory. A crucial role in this context is played by the particle-hole asymmetry of the electronic $Ï$-bands.
5 pages, 4 figures, 1 table