[Wien] How to calculate Plasma Frequency and Number of effective electrons.

[Zaid]

Respected Wien Users

I am inexperience in calculating optical properties May any one guide me
how to calculate Plasmon energy and Number of effective electrons ? After
some effort I came to know that the energy associated to highest peak value
in Electron loss plot will be Plasmon energy. While value for No of
effective electrons can be obtained from X KRAM sumrule. Can Any one
confirm this information true ?  And which sum rule should be selected ?

Best Regards
M, Zaid
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