Coulomb Truncation for GW Calculations for 2D material

[kousika_a]

Hello,

I want to do GW calculations for a 2d material. So, in the VASP forum, I came across a post (2021) which says that coulomb truncation is not possible. Can we do coulomb truncation for GW calculations using VASP now?

Thanks in advance
Kousika

[ferenc_karsai]

Up to now this is not implemented in VASP for GW. It is on our to-do list, but we have no definitive plans when this project will be done.

[kousika_a]

Thank you for the reply!

So is there any other way to achieve faster convergence when doing GW calculations for 2D material using VASP?

[ferenc_karsai]

We have no method at the moment specially for 2d materials, but you should consider using the low-scaling GW algorithms, which generally speed up GW calculations:
https://www.vasp.at/wiki/index.php/Prac ... algorithms