Verification and Validation of GW calculations for solids

Many body perturbation theory based on the GW approximation is a well established approach to compute quasiparticle energies of solids. Yet, systematic convergence tests as a function of basis sets, k-points and other numerical parameters entering the calculation are still lacking. We present a systematic convergence study of quasiparticle energies using a new release of the large-scale GW code WEST[1,2] including accurate k-point sampling of the Brillouin zone[3]. We also discuss comparisons with experiments.\\[4pt][1] M. Govoni and G. Galli, J. Chem. Theory Comput. 11, 2680 (2015); www.west-code.org\\[0pt][2] P. Scherpelz, M. Govoni, I. Hamada and G. Galli J. Chem. Theory Comput. 12, 3523 (2016).\\[0pt][3] I. Hamada, M. Govoni and G. Galli (to be published).