Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-07-08
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 5 figures
Scientific paper
The electronic Raman scattering of bulk graphite at zero magnetic field reveals a structureless signal characteristic of a metal. For T<~100 K and B > 2 T, several peaks at energies scaling linearly with magnetic field were observed and ascribed to transitions from the lowest energy Landau level(s) (LL) to excited states belonging to the same ladder. The LLs are equally (unequally) spaced for high (low) quantum numbers, being surprisingly consistent with the LL sequence from massive Dirac Fermions (m* = 0.033(2) m_e) with Berry's phase 2\pi found in graphene bilayers. These results provide spectroscopic evidence that much of the unconventional physics recently revealed by graphene multilayers is also shared by bulk graphite.
García-Flores Ali F.
Granado Eduardo
Kopelevich Yakov
Terashita H.
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