Re: [Phonopy-users] method of sorting of phonon branches

[Prasad M. <pra...@gm...>]

Dear Togo,
I have gone through the code, I failed to locate the lines for comparison
of eigenvectors. As I am new to python, I request your help and time to
direct me to those lines.

Thanks
Prasad.


On Sun, Aug 25, 2013 at 6:51 PM, Atsushi Togo <atz...@gm...> wrote:

> Hi,
>
> In the band connection in phonopy, eigenvectors at neighboring
> q-points are compared and most similar ones are connected. It's not
> implemented in phonopy as a band connection method, but you may be
> able to use characters of phonon modes
>
> http://phonopy.sourceforge.net/setting-tags.html#characters-of-irreducible-representations-of-phonon-modes
> .
> In group velocity, a perturbation approach same as Hellmann–Feynman
> theorem is used, so sorting is usually unnecessary.
> http://phonopy.sourceforge.net/group-velocity.html#group-velocity .
>
> For more details, please read the code.
>
> Togo
>
> On Sun, Aug 25, 2013 at 9:59 PM, Prasad Matukumilli
> <pra...@gm...> wrote:
> > Dear Dr.Togo,
> >
> > I am working on to code 'sorting of phonon branches' resulted out from
> the
> > eigen solver.
> > I request you to explain the outline of method behind the sorting of
> phonon
> > branches which has been implemented in Phonopy for the features of
> > band_connection or group velocity.
> >
> > Thank you.
> > --
> > **********************************
> > Prasad Matukumilli
> > Research Scholar,
> > Advanced Technology Development Centre,
> > Indian Institute of Technology (IIT)
> > Kharagpur - 721302, India
> > **********************************
> >
> >
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>
> --
> Atsushi Togo
> http://atztogo.github.com/
> atz...@gm...
>



-- 
**********************************
Prasad Matukumilli
Research Scholar,
Advanced Technology Development Centre,
Indian Institute of Technology (IIT)
Kharagpur - 721302, India
**********************************