Related Experiment Video
Updated: Jul 6, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
High-energy limit of massless Dirac fermions in multilayer graphene using magneto-optical transmission spectroscopy
P Plochocka1, C Faugeras, M Orlita
1Grenoble High Magnetic Field Laboratory, CNRS, 38042 Grenoble, France. Paulina.Plochocka@grenoble.cnrs.fr
Abstract:
We have investigated the absorption spectrum of multilayer graphene in high magnetic fields. The low-energy part of the spectrum of electrons in graphene is well described by the relativistic Dirac equation with a linear dispersion relation. However, at higher energies (>500 meV) a deviation from the ideal behavior of Dirac particles is observed. At an energy of 1.25 eV, the deviation from linearity is approximately 40 meV. This result is in good agreement with the theoretical model, which includes trigonal warping of the Fermi surface and higher-order band corrections. Polarization-resolved measurements show no observable electron-hole asymmetry.
Related Concept Videos
Debye–Huckel–Onsager Conductance Equation
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
UV–Vis Spectroscopy: Molecular Electronic Transitions

