My Community

We installed several versions, recently I found that when treating some psudopotentioals (pps), the job cannot work with vasp 5.2 because

this version requires full pseudpotential generation information

However, vasp 5.3.3 can make it work.

So I asked our head of vasp-group for help and got the latest vasp 5.3.5 with the PAW pps. Its surprising there are four PAW compressed files: potpaw_PBE, potpaw_PBE.52, potpaw_LDA, potpaw_LDA.52.

My question is could someone tell me what are the differences between potpaw_PBE and potpaw_PBE.52, as well as the differences between potpaw_LDA, potpaw_LDA.52? Why the jobs with vasp 5.3.3 show the problem stated above?

The older GGA potentials contain the information on the derivative of the electron density.
The newer POTCAR.52s contain not only the first derivative of the kinetic energy density,
but also the second derivative of the electron density. This is necessary when one uses
e.g. meta GGA functionals.