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arXiv · 1809.04351

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

K. Shizuya
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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.

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K. Shizuya. 2018-09-12. Many-body effects on Landau-level spectra and cyclotron resonance in graphene. https://doi.org/10.1103/physrevb.98.115419

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