[Pw_forum] dielectric functions in the region of GHz to THz

[Stefano Baroni]

Well, it depends on the material. If the relevant elementary excitations
 which determine the dielectric constant in that spectral region, then
PWscf+PHONON will certainly do. You'll have to calculate zone-center
phonons + effective charges + static electronic dielectric constant, and
look into a standard textbook how to obtain the diectric constant from
the data so produced (it is very easy). For the time being, PWscf is
unable to deal with any electronic contribution to the dynamic response.
(it can calculate static response, though). Hope this helps. SB

Ichiro Nagano wrote:
> Dear PWscf users,
> 
> It may be a trivial thing,
> I would try to calculate dielectric functions in the region of GHz to THz.
> Can we perform the calculation with PWscf?
> 
> Thanks for any information,
> 
> Ichiro Nagano
> 
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