[Wien] epsilon_2

[saeid pourmasoud]

Dear all,
In order to calculate the effective plasma frequency we need imaginary
part of dielectric function, as discussed in Phys. Rev. B 74, 014209
(2006). For different polarization, we have epsilon_2xx, epsilon_2yy
and epsilon_2zz, but the code dose not give explicitly the epsilon
itself.
Can we obtain the effective plasma frequency by using the following formula?
(epsilon_2)^2={(epsilon_2xx)^2+(epsilon_2xx)^2+(epsilon_2zz)^2}/3
Thanks in advance
S. Pourmasoud
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