Author/Authors :
Pulci، نويسنده , , Olivia and Reining، نويسنده , , Lucia and Onida، نويسنده , , Giovanni and Del Sole، نويسنده , , Rodolfo and Bechstedt، نويسنده , , Friedhelm، نويسنده ,
Abstract :
We have studied the quasiparticle (QP) wave functions and energies of the GaAs(1 1 0) surface and of the cluster Na4 within Hedinʹs GW approximation. We found that the commonly accepted assumption that the Density Functional Theory (DFT)–Local Density Approximation (LDA) wave functions are a very good approximation for the true QP ones can be wrong. We analyze the effect of the resulting changes in the wave functions on the optical spectra.
