[Pw_forum] LO-TO splitting in dynmat.x

[lfhuang]

Dear Wang:
     
>  LO-TO splitting always exists in Brillouin zone, but two points are worth
> > noting:
> >
> I do not think so. I do not find any LO-TO splitting at the X and R point of
> Brillouin zone of cubic.

This could depend on the definition of "LO-TO splitting", which I meant "the reduction of the LO-TO degeneracy".
If it is defined to be the splitting due to the long-range electric force on LO,  it will disappear in BZ zone.   

Best Wishes!
Yours Sincerely
L. F. Huang
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L.F.Huang(黄良锋) DFT and phonon physics
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Add: Research Laboratory for Computational Materials Sciences,
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