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.
CITATION STYLE
Polini, M., & Vignale, G. (2016). The quasiparticle lifetime in a doped graphene sheet. In No-nonsense Physicist (pp. 107–124). Scuola Normale Superiore. https://doi.org/10.1007/978-88-7642-536-3_9
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