Is the band structure across the entire Brillouin zone at finite-temperature physically meaningful?

[bowen yang]

Dear Sir/Madam,
While calculating the quasiparticle band structure at finite temperatures, I noticed that the tutorial on this website ( https://wiki.yambo-code.eu/wiki/index.p ... n_Coupling ) only includes the temperature-dependent evolution of the quasiparticle band gap, but not the full band structure across the entire Brillouin zone at specific temperatures (e.g., 300 K).

My question is: Is the fitted finite-temperature band structure physically meaningful, or just the finite-temperature band gap?

Thank you in advance for your time and expertise.
Best regards,
Yang

[Daniele Varsano]

Dear Yang,

apologize for the late reply, in the last month we had issues with the forum website that have been solved only now.

Please sign your post with your name and affiliation, this is a rule of the forum, you can do once for all by filling the signature in your user profile.

I'm not an expert on el-ph calculation, anyway from my understanding they are meaningful. Others developers/users expert in the topic can confirm this in case there are details in the implementation I do ignore.

Best,
Daniele

[bowen yang]

Dear Daniele,
Thank you very much for your reply. I hope that more attention will be drawn to the study of band structures at finite temperatures. Also, I really appreciate your kind reminder and have updated my personal information accordingly.

Once again, thank you for your time and assistance!

Best regards,
Yang