External electric field

[young]

Dear developers,

I want to focus on an external electric field effect on the GW band structure and BSE. Firstly, I apply the finite electric field in my calculation through the modern theory of the polarization in QE Code. My question is how can I do next ? Can I perform the GW calculation using the wavefunction from QE ? What parameter can I set in YAMBO ? Thanks in advance!

With Regards
Ke

[Daniele Varsano]

Dear Ke,
please add your affiliation in your signature. This ia a rule of the forum and you can do once for all in the user profile panel.
I think that if you have included the electric filed in the ground state, next you can perform perturbation theory on top of that, ie using KS eigenvalues and eigenfunction obtained under the effect of the electric field without any particular attention on the Yambo side. I do not know if in this way there is something missing, maybe other users can comment on that.

Best,
Daniele

[young]

Dear Daniele,

Thank you for your reply quickly. I will perform the calculation based on what you said.

Best
Ke

Ke Yang
PHD student
Rensselaer polytechnic institute， Troy, NY, US
Hunan university, changsha, Hunan, China