The Role of Electron-electron Interactions in Graphene ARPES Spectra

Details The Role of Electron-electron Interactions in Graphene ARPES Spectra The Role of Electron-electron Interactions in Graphene ARPES Spectra

2007-07-28

arxiv.org/abs/0707.4230v1

Phys. Rev. B 77, 081411(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 Pages, 4 Figures, Submitted

Scientific paper

10.1103/PhysRevB.77.081411

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 $\alpha_{\rm gr}$ and might enable an experimental determination of this material parameter.

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