A problem when ecutrho was used

Theory Electron-phonon coupling
1

Dear all,
I encountered a problem when I was running the EPW code by using USPP: If only ecutwfc was defined or ecutwfc and ecutrho were both defined (ecutrho is small) in SCF and NSCF, and then the EPW ran well; however, the EPW would always keep at follow status and couldnt run to next step if ecutrho was large (e.g. 240 Ry for my computer). I dont know why and can you give me some suggestions?

The epw.out:

http://www.quantum-espresso.org/quote

Parallel version (MPI), running on 28 processors

MPI processes distributed on 1 nodes
K-points division: npool = 28

Reading data from directory:
./graphene.save/

IMPORTANT: XC functional enforced from input :
Exchange-correlation = PBE ( 1 4 3 4 0 0)
Any further DFT definition will be discarded
Please, verify this is what you really want

      file C.pbe-mt_fhi.UPF: wavefunction(s)  4f renormalized

G-vector sticks info

sticks: dense smooth PW G-vecs: dense smooth PW
Sum 1189 1189 397 202311 202311 39267

2

Dear jyxi,

I had the same problem, please look here: [url:gwnjjzpu]http://epwforum.uk/viewtopic.php?f=6&t=447[/url:gwnjjzpu]

As far as I know, EPW still only supports norm-conserving pseudo potentials.

Best, Tobias

3

Hello both,

We have been working on EPW support for USPP.
It should now be working in the GitLab development version. Let us know if it works for you.

Best wishes,
Samuel