Hi,
I am interested in calculation dielectric function of bulk materials. I have seen there are many ways to do that e.g, DFT epsilon.x, yambo Independent Particle: Random Phase Approximation, yambo BSE. Would someone please explain me the basic difference among the ways to calculate dielectric function?
Thanks
Dear Md. Jahid Hasan Sagor
If I understand correctly your question, you want to calculate the dielectric tenzor. There are some ways to calculate it in Quantum Espresso. One of them is useing from epsilon.x.
But I have another idea. You can use from phonon calculation ph.x, in the output file of the phonon calculation you can find the dielectric tensor.
Jasurbek Gulomov
Jasurbek Gulomov Thank you for your answer. Actually, I am more interested to know the theoretical differences among those.
Ehsanul Azim