Which one of the GGA or G0W0 calculations is more accurate?

[Mohammad-gl]

TL;DR

I want to compare my tight binding results with DFT calculation. Which one GGA or G0W0 is more trustable to compare?

I want to compare my tight binding results with DFT calculation. Which one GGA or G0W0 is more trustable to compare?

 

[TeethWhitener]

It really depends on what you’re interested in. If you’re looking for something like equilibrium geometry, GGA would probably be better. If you’re after accurate bandgaps, GW is probably better.

 

[Mohammad-gl]

It really depends on what you’re interested in. If you’re looking for something like equilibrium geometry, GGA would probably be better. If you’re after accurate bandgaps, GW is probably better.

Thank you