GGA = 91 | PE | RP | PS | AM
|Default||- , XC type is chosen according to POTCAR|
This tag was added to perform GGA calculation with pseudopotentials generated with conventional LDA reference configurations. The tag is named GGA. Possible options are
|91||Perdew -Wang 91|
|AM||AM05 (Ref. [49,50], VASP tests see Ref. )|
|PS||Perdew-Burke-Ernzerhof revised for solids (PBEsol, see Ref. )|
The tags AM (AM05) and PS (PBEsol) are only supported by VASP.5.X. The AM05 functional and the PBEsol functional are constructed using different principles, but both aim at a decent description of yellium surface energies. In practice, they yield quite similar results for most materials. Both are available for spin polarized calculations.