Available pseudopotentials:
Perdew-Burke-Ernzerhof (PBE) exch-corr nonlinear core-correction semicore state s in valence semicore state p in valence Projector Augmented Waves (original Bloechl recipe)
Perdew-Zunger (LDA) exch-corr Bachelet-Hamann-Schlueter and derived
Perdew-Zunger (LDA) exch-corr nonlinear core-correction Von Barth-Car (direct fit)
Perdew-Wang 91 gradient-corrected functional nonlinear core-correction semicore state p in valence Vanderbilt ultrasoft