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

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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.
4 pages

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/121636

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0609037
 http://arxiv.org/abs/cond-mat/0609037
 Phys. Rev. Lett. 97, 256801 (2006)
 doi:10.1103/PhysRevLett.97.256801

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