[Pw_forum] Regarding raman intensity

[Prasenjit Ghosh]

Your system may be 2-d (eg. surface), but you are doing the calculations in
a three dimensional space.
Therefore you get (2x3=) 6 phonon modes.

>   I have confusion that in 2 dimension there should be only 4 optical
phonons
 For a 2-d system with 2 atoms per unit cell, there will be (2x2=) 4 phonon
modes, out of which 2 should be acoustic and 2 optical.

Prasenjit.


and corresponding 4 no. of raman
> tensor matrices, but i am getting 6 tensors matrices.
>     Please help me..
>  Thanks,
>   Arun
> --
> PhD Student
> JNCASR, Bangalore-560064
> India
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