ABINIT Discussion Forums

Hello, Everyone.
When i finished the NLO calculation, i find the code caculated the electronic dielectric tensor. i known the dielectric tensor is a funcion with wavelength, so i wonder the dielectric tensor gived here related to which wavelength. Besides, i known the dielectric constant is the square of the refractive index, is these parameters that the code gived is somewhat related to the Sellmeier equations to determine the refractive index .
Thanks in advanced

Zhang Xiaole

The DFPT coded in abinit is for a static electric field. The frequency dependence which does appear is for the phonon contribution to the dielectric constant.

You need to be more specific - are you using optic? anaddb?

I don't know about the Sellmeier equations... You can always calculate n and reflectivity from the dielectric constants.

Matthieu