[Pw_forum] How to distinguish phonon modes?

[Peram sreenivasa reddy]

Dear Park,

You can check case.ph.out file to know about the each mode.


On Mon, Dec 2, 2013 at 7:58 AM, Kyeong-hyun Park <kpark39 at illinois.edu>wrote:

> Dear all,
>
> Hi, this question might have been asked already. Please direct me to the
> previous post if you know of any similar issue discussed already. I tried
> to find, but I couldn't.
>
> After the phonon dispersion calculation, I get the 'si.freq' and '
> si.freq.gp'
> I was able to plot along different directions, but how would I extract a
> specific phonon mode (for example, LA or TA1) from the frequency data file.
> I need to use only one mode of frequencies to do my calculation. Please
> help.
>
> Thank you in advance,
> Kyeong Park
>
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