Dirac and Normal Fermions in Graphite and Graphene: Implications of the Quantum Hall Effect
Abstract
Spectral analysis of the Shubnikov de Haas magnetoresistance oscillations and the quantum Hall effect (QHE) measured in quasi-2D highly oriented pyrolytic graphite (HOPG) [Phys. Rev. Lett. 90, 156402 (2003)PRLTAO0031-900710.1103/PhysRevLett.90.156402] reveals two types of carriers: normal (massive) electrons with Berry phase 0 and Dirac-like (massless) holes with Berry phase π. We demonstrate that recently reported integer- and semi-integer QHEs for bilayer and single-layer graphenes take place simultaneously in HOPG samples.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2006
- DOI:
- arXiv:
- arXiv:cond-mat/0609037
- Bibcode:
- 2006PhRvL..97y6801L
- Keywords:
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- 81.05.Uw;
- 71.20.-b;
- Carbon diamond graphite;
- Electron density of states and band structure of crystalline solids;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages