Magneto-transmission measurements in magnetic fields in the range B=20-60T have been performed to probe the H and K-point Landau level transitions in natural graphite. At the H-point, two series of transitions, whose energy evolves as B are observed. A reduced Slonczewski, Weiss and McClure (SWM) model with only two parameters to describe the intra-layer (gamma0) and inter-layer (gamma1) coupling correctly describes all observed transitions. Polarization resolved measurements confirm that the observed apparent splitting of the H-point transitions at high magnetic field cannot be attributed to an asymmetry of the Dirac cone.
@article{arxiv.1102.2756,
title = {High field magneto-transmission investigation of natural graphite},
author = {N. Ubrig and P. Plochocka and P. Kossacki and M. Orlita and D. K. Maude and O. Portugall and G. L. J. A. Rikken},
journal= {arXiv preprint arXiv:1102.2756},
year = {2015}
}