[Pw_forum] LO-TO splitting in dynmat.x

[xirainbow]

Dear Huang:
Thanks very much for your help:)

 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.
Because I use finite difference method, I do not know LO-TO splitting
persists at other part.


> (2) only cubic crystals has LO and TO braches.
>
The LO-TO splitting exists also in uniaxial crystal(direction dispersion in
Raman).
-- 
____________________________________
Hui Wang
School of physics, Fudan University, Shanghai, China
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