Plasmon and quasiparticle band structures in β-SiC

We use a recently developed plasmon-pole model to calculate the plasmon band structure in beta -SiC. The obtained lowest plasmon energy is in excellent agreement with electron-energy-loss measurements. We also employ this plasmon-pole model for an analytic description of the energy dependence of the dynamically screened interaction W, which is used to calculate the quasiparticle band structure in the GW approximation. This band structure compares favorably with experiment and with other calculations using different techniques