Spin Splitting, Fermi Energy Changes, and Anomalous g Shifts in Single-Crystal and Pyrolytic Graphite
This Letter reports the first observation of spin-split Landau levels in graphite. These are observed in both natural single crystals and in pyrolytic samples. Experimental splittings are compared with the theory of McClure and Yafet. Discrepancy between theory and experiment is partially accounted for by large shifts in the Fermi energy with field.