Electron-electron interactions and plasmon dispersion in graphene
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Levitov-2013-Electron-electron interactions.pdf
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Author(s)
Shtyk, A.
Feigelman, M.
Levitov, Leonid
Date Issued
December 2013
Journal
Physical Review B
Publisher
American Physical Society
Citation
Levitov, L., A. Shtyk, and M. Feigelman. “Electron-Electron Interactions and Plasmon Dispersion in Graphene.” Phys. Rev. B 88, no. 23 (December 2013). © 2013 American Physical Society
Version
Final published version
Abstract
Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to relate plasmon dispersion at long wavelengths to Landau Fermi-liquid interactions and quasiparticle velocity. An identical renormalization is shown to arise for the magnetoplasmon resonance. For a model with N ≫ 1 fermion species, this approach predicts a power-law dependence for plasmon frequency vs carrier concentration, valid in a wide range of doping densities, both high and low. Gate tunability of plasmons in graphene can be exploited to directly probe the effects of electron-electron interaction.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.88.235403
