[Pw_forum] Problems with phonon calculation

[Andrew Lee]

I have a related question. With the current version of PWSCF, is it possible
only to do the electric field perturbation? If possible, how to setup the
input parameters? Thanks
Best,
Zhenyu

University of Science and Technology of China
Hefei, Anhui 230026, China

On Wed, Feb 11, 2009 at 1:07 AM, Ary Junior <aryjunior at gmail.com> wrote:

> Hello,
>
> I have a very large system and I must do a phonon calculation. This
> calculation takes months, so I want to do with only few atoms. But the
> variable nat_todo seems to not work. When I enable the variable for a little
> system, it only makes the calculation ph.x to the atoms that I ask, but with
> my system of interest, no matter if I insert nat_todo, nrapp or maxirr, it
> continues making 3*n representations.
>
> Thanks very much!
>
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