ABINIT Discussion Forums

Hi dear users.
Is it possible to calculate other optical constants, such as refractive
index n(ω), absorption coefficient α(ω), reflectivity
R(ω) and electron energy-loss spectrum L(ω) by abinit?
I find calculation of ε1(ω) and ε2(ω) in lesson_optic but no information about other constants.
Thankful.

All of these coefficients are related to one another, and to the dielectric matrix (e1 = real part and e2 = imaginary part).

http://en.wikipedia.org/wiki/Refractive_index

It would be nice to have explicit output files with all the quantities you mention - any volunteers?