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arXiv · 0707.4230

The Role of Electron-electron Interactions in Graphene ARPES Spectra

Marco Polini·Reza Asgari·Giovanni Borghi·Yafis Barlas·T. Pereg-Barnea·A. H. MacDonald
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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 $α_{\rm gr}$ and might enable an experimental determination of this material parameter.

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Marco Polini, Reza Asgari, Giovanni Borghi, Yafis Barlas, T. Pereg-Barnea, A. H. MacDonald. 2007-07-28. The Role of Electron-electron Interactions in Graphene ARPES Spectra. https://doi.org/10.1103/physrevb.77.081411

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