Many-body effects on Landau-level spectra and cyclotron resonance in graphene

Abstract

Recently Russell et al. [Phys. Rev. Lett. 120, 047401 (2018)] have reported a clear signal of many-particle contributions to cyclotron resonance in high-mobility hBN-encapsulated graphene, observing significant variations of resonance energies as a function of the filling factor $\nu$ for a series of interband channels. To elucidate their results, Coulombic contributions to the Landau-level spectra and cyclotron resonance in graphene are examined with a possible band gap taken into account and with emphasis on revealing electron-hole ($eh$) conjugation symmetry underlying such level and resonance spectra. Theory, based on the single-mode approximation, gives a practically good account of the experimental data; the data suggest a band gap of ~ 10 meV and show a profile that apparently reflects $eh$ conjugation symmetry.

11 pages, 6 figures, 3 tables, revtex

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Cited by in corpus (5)

• Broken symmetries and Kohn's theorem in graphene cyclotron resonance
• Many-body filling-factor dependent renormalization of Fermi velocity in graphene in strong magnetic field
• Many-body effects, orbital mixing and cyclotron resonance in bilayer graphene
• Persistent current distributions along a p-n junction in graphene in a magnetic field
• Many-body effects in suspended graphene probed through magneto-phonon resonances