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arXiv · 0707.3651

Phonon-induced many-body renormalization of graphene electronic properties

Wang-Kong Tse·S. Das Sarma
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Abstract

We develop a theory for the electron-phonon interaction effects on the electronic properties of graphene. We analytically calculate the electron self-energy, spectral function and band velocity renormalization due to phonon-mediated electron-electron interaction. We find that phonon-mediated electron-electron coupling has a large effect on the graphene band structure renormalization, and our analytic theory successfully captures the essential features of the observed graphene electron spectra in the ARPES experiments, predicting a kink at $\sim 200\mathrm{meV}$ below the Fermi level and a reduction of the band velocity by $\sim 10-20%$ at the experimental doping level.

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Wang-Kong Tse, S. Das Sarma. 2007-10-19. Phonon-induced many-body renormalization of graphene electronic properties. https://doi.org/10.1103/physrevlett.99.236802

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