EPW Forum

Dear experts,

Is it possible to calculate the electron-phonon matrix elements (g) along some kpath and not on a grid?
Can I give any random k point and EPW calculates the g for the chosen q and k?

Thanks,
Shubham

Dear Shubham,

Yes this can be done by specifying tag filkf and filqf to provide an arbitrary set of k and/or q points:

https://docs.epw-code.org/doc/Inputs.html#filkf
https://docs.epw-code.org/doc/Inputs.html#filqf

And using prtgkk to print the el-ph matrix elements. I would recommend checking exercise #2 under the tutorial of interpolation of electron-phonon matrix element under Tuesday: https://epw2024.oden.utexas.edu/74-schedule.

Please see if this is helpful.
Thanks!
Xiao

Dear Xiaozha,

It is helpful, yes.
Thank you,