2006/09/30 by Igor Lukyanchuk, Igor A. Luk'yanchuk, Y. Kopelevich +1 · 4 citations
Materials Science · Physics and Astronomy · #Bilayer graphene #Composite fermion #Condensed matter physics #Dirac (video compression format) #Dirac equation #Dirac fermion #Electron #Fermion #Geometric phase #Graphene #Graphene research and applications #Half-integer #Highly oriented pyrolytic graphite #Landau quantization #Magnetic field #Magnetoresistance #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.97.256801
published as Phys. Rev. Lett. 97, 256801 (2006) · 4 pages
openalex publication_date 2006/12/20 · arxiv created 2007/01/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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)] 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 QHEs for bilayer and single-layer graphenes take place simultaneously in HOPG samples.