Landau level spectroscopy of ultrathin graphite layers
M. L. Sadowski, G. Martinez, M. Potemski, C. Berger, W. A. de Heer
Abstract
Far infrared transmission experiments are performed on ultrathin epitaxial graphite samples in a magnetic field. The observed cyclotron resonance-like and electron-positron-like transitions are in excellent agreement with the expectations of a single-particle model of Dirac fermions in graphene, with an effective velocity of c* = 1.03 x 106 m/s.
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