Optical properties of extended systems within a current-current response formalism: tips and tricks

velocityposterIn this work we compare the optical absorption of extended systems calculated starting from the density-density and current-current linear response formalisms within the equilibrium many-body perturbation theory(MBPT). We show how, using the latter, one can incur in errors due to quasiparticle lifetimes, electron-hole interaction or the presence of a Drude tail. These errors are found in different papers and computational codes. We present a solution for each one of these problems.

Poster: Excitons, lifetime and Drude tail within the current-current response framework

Paper: Optical properties of periodic systems within the current-current response framework: pitfalls and remedies

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