Accelerating GW in 2D systems

Since Yambo v5.1 it is possible to use an algorithm able to accelerate convergences of GW calculations in two-dimensional systems with respect to the k point sampling.

The method is explained in the paper:

Efficient GW calculations in two dimensional materials through a stochastic integration of the screened potential

A. Guandalini, P. D'Amico, A. Ferretti and D. Varsano

available at the link: https://arxiv.org/abs/2205.11946

The method makes use of a truncated Coulomb potential in a slab geometry:

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