Assessing the $G_0{W}_0{\Gamma }_0^{(1)}$ approach: Beyond $G_0{W}_0$ with Hedin's full second-order self-energy contribution

Yanyong Wang, Patrick Rinke, Xinguo Ren

We present and benchmark a self-energy approach for quasiparticle energy calculations that goes beyond Hedin's $GW$ approximation by adding the full second-order self-energy (FSOS-…