Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect

Details Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect

2006-09-02

arxiv.org/abs/cond-mat/0609037v2

Phys. Rev. Lett. 97, 256801 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

10.1103/PhysRevLett.97.256801

Spectral analysis of Shubnikov de Haas (SdH) oscillations of magnetoresistance and of Quantum Hall Effect (QHE) measured in quasi-2D highly oriented pyrolytic graphite (HOPG) [Phys. Rev. Lett. 90, 156402 (2003)] reveals two types of carriers: normal (massive) electrons with Berry phase 0 and Dirac-like (massless) holes with Berry phase pi. We demonstrate that recently reported integer- and semi-integer QHE for bi-layer and single-layer graphenes take place simultaneously in HOPG samples.

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