where ∇ is the kinetic energy operator, V ion is the ionic potential, V H is the Hartree potential, Σ is the nonlocal, energy-dependent self energy within the GW approximation, and E QP nk and ψ QP nk are the quasiparticle energies and wavefunctions, respectively. We use the singleparticle wavefunctions from DFT as our quasiparticle wavefunctions (the diagonal approximation) and iterate to self-consistency in the quasiparticle energies that enter into the Green's function G in the GW approximation. GW calculations carried out using the DFT vacuum or SaLSA wavefunctions are labeled as GW@GGA or GW@GGA+SaLSA, respectively.