Abstract
The electronic Raman scattering of bulk graphite at zero magnetic field reveals a structureless signal characteristic of a metal. For $B\ensuremath{\gtrsim}2\text{ }\text{T}$, several peaks at energies scaling linearly with magnetic field were observed and ascribed to transitions from the lowest energy Landau level(s) [LL(s)] to excited states belonging to the same ladder. The LLs are equally (unequally) spaced for high (low) quantum numbers, being consistent with the LL sequence from massive chiral fermions $[{m}^{\ensuremath{\ast}}=0.033(2){m}_{e}]$ with Berry's phase $2\ensuremath{\pi}$ found in graphene bilayers. These results provide spectroscopic evidence that some of the physics recently revealed by graphene multilayers is also shared by bulk graphite.
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