Yambo Community Forum

Posted: **Thu Dec 31, 2020 6:39 pm**

Dear all

I followed the steps of the tutorial

http://www.yambo-code.org/wiki/index.ph ... n_Coupling

it works but I saw that in the input file there are different parameters not explained in the tutorial

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 PHfreqF= "none"                  # PWscf format file containing the phonon frequencies
 PHmodeF= "none"                  # PWscf format file containing the phonon modes
#GkkpExpand                      # Expand the gkkp in the whole BZ
#GkkpConvert                     # Convert the gkkp to new I/O format

and

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 RandQpts=0                       # [RIM] Number of random q-points in the BZ

what they are for?

best regards
Javad

Posted: **Fri Jan 01, 2021 9:45 am**

Dear Javad

the

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GkkpExpand

is used for other calculations not present in the GPL, while '

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GkkpConvert

is used to checking purpose the IO for different versions
of the databases. You do not need any of them.

For the other input variables, people more expert than me we will reply to your post.

Regards
Claudio

Yambo Community Forum

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Questions about the electron-phonon coupling

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