[Wien] a question about OPTIC

[Ardalan Armin]

Dear sir

The dielectric function in a lattice is a 3*3 tensor with some
symmetries. in a S.C. case the dielectric tensor is a scalar because
of the the cubic sysmeties. and in the hexagonal or tetragonal case
the matix has two independent component. the (1,1)=(2,2)=xx and the
(3,3)=yy

good luck!

On 7/19/05, Ruijuan Xiao <rjxiao at blem.ac.cn> wrote:
> Dear users,
>  When I use the OPTIC program in WIEN2k to calculate the dielectric functions and loss functions, I found that there are two or three components to epsilon for the non-cubic systems(e.g. for hexagonal,they are epsilon(xx) and epsilon(zz)).I wonder can the final epsilon and loss function be obtained by simply averaged over these different components?
> 
>  I am looking forward to your reply. Thank you very much.
> 
> Best regards,
> 
> Sincerely,
> Ruijuan Xiao
> 
> 
> 
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