Available pseudopotentials:
Perdew-Burke-Ernzerhof (PBE) exch-corr nonlinear core-correction semicore state s in valence semicore state p in valence Vanderbilt ultrasoft
Perdew-Wang 91 gradient-corrected functional nonlinear core-correction semicore state s in valence semicore state p in valence Vanderbilt ultrasoft
Zr.pw91-sp-rrkjus.UPF (details)
Perdew-Wang 91 gradient-corrected functional semicore state s in valence semicore state p in valence Rabe Rappe Kaxiras Joannopoulos (ultrasoft)