Influence of interlayer asymmetry on magneto-spectroscopy of bilayer graphene

TL;DR

This paper investigates how interlayer asymmetry induced by electric fields affects the magneto-spectroscopy of bilayer graphene, providing insights into Landau levels and optical transitions under high magnetic fields.

Contribution

It offers a self-consistent theoretical model linking interlayer asymmetry to observable magneto-spectroscopic features in bilayer graphene.

Findings

Interlayer asymmetry modifies Landau level spectrum.

Electric field influences inter-Landau level transitions.

Magneto-optical spectra reveal band splitting effects.

Abstract

We present a self-consistent calculation of the interlayer asymmetry in bilayer graphene caused by an applied electric field in magnetic fields. We show how this asymmetry influences the Landau level spectrum in bilayer graphene and the observable inter-Landau level transitions when they are studied as a function of high magnetic field at fixed filling factor as measured experimentally by E.A. Henriksen et al., Phys. Rev. Lett. 100 (2008), 087403. We also analyze the magneto-optical spectra of bilayer flakes in the photon-energy range corresponding to transitions between degenerate and split bands of bilayers.