Journal
PHYSICAL REVIEW B
Volume 86, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.155409
Keywords
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Funding
- European Science Foundation Epitaxial Graphene Transistor (EPI-GRAT) Project [GRA/10/E006]
- Grant Agency of the Czech Republic Grant Magneto-spectroscopy of Dirac fermions [P204/10/1020]
- programme Transnational access Contract [228043-EuroMagNET II-Integrated Activities]
- Academy of Sciences of the Czech Republic research programmes [AVOZ10100521]
- Nanotechnology for Society [KAN400100652]
- Charles University in Prague Grant GAUK [SVV-2012-265306]
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The electronic structure of Bernal-stacked graphite subjected to tilted magnetic fields has been investigated using infrared magnetotransmission experiments. With the increasing in-plane component of the magnetic field B-parallel to, we observe significant broadening and partially also splitting of interband inter-Landau-level transitions, which originate at the H point of the graphite Brillouin zone, where the charge carriers behave as massless Dirac fermions. The observed behavior is attributed to the lifting of the twofold degeneracy of Landau levels at the H point-a degeneracy which in graphite complements the standard spin and valley degeneracies typical of graphene.
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