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arXiv · 1404.5728

The quasiparticle lifetime in a doped graphene sheet

Marco Polini·Giovanni Vignale
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Abstract

We present a calculation of the quasiparticle decay rate due to electron-electron interactions in a doped graphene sheet. In particular, we emphasize subtle differences between the perturbative calculation of this quantity in a doped graphene sheet and the corresponding one in ordinary parabolic-band two-dimensional (2D) electron liquids. In the random phase approximation, dynamical overscreening near the light cone yields a universal quasiparticle lifetime, which is independent of the dielectric environment surrounding the 2D massless Dirac fermion fluid.

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Marco Polini, Giovanni Vignale. 2014-04-23. The quasiparticle lifetime in a doped graphene sheet. https://arxiv.org/abs/1404.5728

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