[Pw_forum] LO-TO splitting

[degironc]

The point is explained in Review of Moderm Physiscs 73, 515 (2001).
example06 shows how to take care of if for full phonon dispersions.
another way is to use code dynmat.x on the dynamical matrix generated by
ph.x
stefano


Ezad Shojaee wrote:

> Hi
> when i use phonon calculation for Gamma point, i do not have splitted 
> modes, for example i have E_u mode, not E_u(LO) and E_u(TO).
> what's the point?
>
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