yasef
Jan9-12, 02:57 PM
I have derived 2D dispersion relation which has the same atoms. But I also need to calculate this 2D dispersion relation with two different atoms. One atom is located at the center and the other type of atoms surrounds this atom. But I am not sure how ı should calculate it because only difference with the first system is force constant. I should need different perspectives or some calculatıons about it.