EPW Forum

Dear all, I am wondering what is the relation between the following two quantities. 1. the total electron-phonon coupling strength lambda which is defined as the integral of Eliashberg function over omega (as Eq. 206 in F. Giustino RMP (2017)) 2. the electron-phonon mass enhancements (lambda_nk) as ...

I encountered the same problem when calculating graphene using EPW. EPW dies at wigner_seitz.f90 saying weights do not add up to nk1*nk2*nk3 But, this problem can be fixed by using less restrictive value of epsilon at the line 132 in wigner_seitz.f90 DO while ( abs(dist(i)-mindist).le.eps7 .and. i ...

Dear Dr. Lee,

It is nice to meet you too.
Thank you for your comment, and it seems the problem is solved when I fixed the code according to your comment.
But, as you mentioned, I decided to use NCPP in this EPW version.

Thank you,
Young Woo Choi

I found that this problem only occurs when using ultrasoft pseudopotentials. When I run the code with the same input files but with a norm-conserving pseudo potential, the above problem did not occur and the wannierization procedure went well. Since I am not familiar with USPP, it is hard for me to ...

Dear All, I found a problem during the wannierization of graphene. When I run the EPW code in serial mode (without mpirun ), the wannierization procedure seems to be fine and the resulting wannier functions are consistent with what I get by directly running wannier90 code. However, when I use mpirun ...