intraband transition

[Sam-2025]

Dear All,



we are doping electron on BTO, it reduce the band gap ,and our calculation shows the system with metallic error, is any way , we solve this problem ?
in the following tutorial, we are able to check band gap vs T (effect of temperature to band gap ), can we also use Yambo, to check intraband vs T? also yambo focus mostly on VB to CB transition, Can we use it to see intraband transition ( CB to CB ) ? I mean when we are solving BSE, to get the adsorption spectrum, is any way we can see what happen between conduction bands ? Thank you so much for your guidance. I really appreciate it.

https://wiki.yambo-code.eu/wiki/index.p ... n_Coupling

[Daniele Varsano]

Dear Samira,

intraband transitin are taken into account for any finite q different from zero. At q=0 in the BSE framework you can account them by using a Drude model that needs Drude plasmon frequency and width in input as heuristic parameters.

Best,
Daniele