Available pseudopotentials:
Perdew-Zunger (LDA) exch-corr semicore state d in valence Vanderbilt ultrasoft
Perdew-Zunger (LDA) exch-corr Bachelet-Hamann-Schlueter and derived
Perdew-Burke-Ernzerhof (PBE) exch-corr semicore state d in valence Vanderbilt ultrasoft