[Pw_forum] about Phonon results

[lan haiping]

Have you ever employed acoustic sum rule ?
you can do a search on this topic over the forum archives.
PS, please supply your affiliation .

On Sat, Jun 14, 2008 at 2:57 AM, <xwzhang at uestc.edu.cn> wrote:

> Dear my pwscf friends,
>
> Recently, I am trying to do phonon calculations in Heusler. As a first
> step, I tried to reproduce the results of a paper by Zayak(PRB, 72, 054113,
> 2005). I choose Ni2MnGe as an example. To my surprise, the acoustic branches
> at Gamma point gives a frequency of about 1 THz, which should be zero. Other
> branches agree with the published data.
>
> I wonder what might be the reason? I attached my scf, and phonon input
> files, and the phonon out put files.
>
> I have another question about the output: What is the difference between
> the total magnetic moment and the absolute magnetic moment.
>
> Thank you and wish you a happy weekend!
>
> Wenxu Zhang
>
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-- 
Hai-Ping Lan
Department of Electronics ,
Peking University , Bejing, 100871
lanhaiping at gmail.com, hplan at pku.edu.cn
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