Theory of inter-Landau-level magnetoexcitons in bilayer graphene

Judit Sári, C. Töke

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

If bilayer graphene is placed in a strong perpendicular magnetic field, several quantum Hall plateaux are observed at low enough temperatures. Of these, the σxy=4ne2/h sequence (n≠0) is explained by standard Landau quantization, while the other integer plateaux arise due to interactions. The low-energy excitations in both cases are magnetoexcitons, whose dispersion relation depends on single- and many-body effects in a complicated manner. Analyzing the magnetoexciton modes in bilayer graphene, we find that the mixing of different Landau level transitions not only renormalizes them, but essentially changes their spectra and orbital character at finite wavelength. These predictions can be probed in inelastic light scattering experiments.

Original languageEnglish
Article number085432
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number8
DOIs
Publication statusPublished - Feb 19 2013

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Graphene
plateaus
graphene
Inelastic scattering
Excitation energy
Light scattering
integers
inelastic scattering
light scattering
Magnetic fields
orbitals
Wavelength
predictions
magnetic fields
wavelengths
excitation
Experiments
interactions
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Theory of inter-Landau-level magnetoexcitons in bilayer graphene. / Sári, Judit; Töke, C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 87, No. 8, 085432, 19.02.2013.

Research output: Contribution to journalArticle

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