The Role of Electron-electron Interactions in Graphene ARPES Spectra

Abstract

We report on a theoretical study of the influence of electron-electron interactions on ARPES spectra in graphene that is based on the random-phase-approximation and on graphene's massless Dirac equation continuum model. We find that level repulsion between quasiparticle and plasmaron resonances gives rise to a gap-like feature at small k. ARPES spectra are sensitive to the electron-electron interaction coupling strength ${\alpha }_{\mathrm{gr}}$ and might enable an experimental determination of this material parameter.

arXiv comment5 Pages, 4 Figures, Submitted

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