Electron-electron interactions and plasmon dispersion in graphene
Author(s)
Shtyk, A.; Feigelman, M.; Levitov, Leonid
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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.
Date issued
2013-12Department
Massachusetts Institute of Technology. Department of PhysicsJournal
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
ISSN
1098-0121
1550-235X