Electronic excitations and electron-phonon coupling in bulk graphite through Raman scattering in high magnetic fields
Physical Review B
We use polarized magneto-Raman scattering to study purely electronic excitations and the electron-phonon coupling in bulk graphite. At a temperature of 4.2 K and in magnetic fields up to 28 T we observe K-point electronic excitations involving Landau bands with Δ |n|=0 and with Δ |n|=±2 that can be selected by controlling the angular momentum of the excitation laser and of the scattered light. The magneto-phonon effect involving the E_2g optical phonon and K-point inter Landau bands electronic
... xcitations with Δ |n|=±1 is revealed and analyzed within a model taking into account the full k_z dispersion. These polarization resolved results are explained in the frame of the Slonczewski-Weiss-McClure (SWM) model which directly allows to quantify the electron-hole asymmetry.