Landau level spectroscopy of ultrathin graphite layers
M.L. Sadowski, G. Martinez, M. Potemski, C. Berger, W.A. de Heer
TL;DR
This study uses far infrared transmission experiments to investigate Landau levels in ultrathin graphite, confirming Dirac fermion behavior with high precision and providing insights into the electronic properties of graphene-like materials.
Contribution
It provides experimental validation of the Dirac fermion model in ultrathin graphite through detailed Landau level spectroscopy.
Findings
Observation of cyclotron resonance-like transitions
Agreement with single-particle Dirac fermion model
Effective velocity c* = 1.03 x 10^6 m/s
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 10^6 m/s.
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