Momentum Matrix elements

[kaynat_kalvi]

Hi,
I need to calculate the momentum matrix elements for my supercell.
I think getting a WAVEDAR file will do the job? but I am not sure would it include everything needed for using momentum matrix elements for optical properties?
I am confused in the potentials to use for getting a WAVEDER, as PAW doesnt include core of atoms and for momentum matrix elements and the optical properties we need cores? so should I use GW potential for calculating WAVEDER?
There are some post-processing tools to get (vasp2mat,vaspkit) who accurate are they to do this job ?

[manuel_engel1]

Hi,

You are correct. The WAVEDER file has the information you need. However, after looking at the documentation on the VASP wiki, it is unclear to me if this is still up-to-date. I will get back to you with a full answer once I have confirmation.