Re: [QE-users] Convergence tests for slabs

2022-12-20 Thread Léon Luntadila Lufungula
Hi Giovanni, Thank you for your answer! I do have some follow-up questions if you don't mind. When converging the clean slab, which electronic properties do you propose to look at for convergence? Because up until now, I have only done convergence tests by looking at the total energies of my sy

Re: [QE-users] Convergence tests for slabs

2022-12-19 Thread Giovanni Cantele
Strictly speaking, you should get convergence of the clean slab first, concerning both the slab thickness and the vacuum. Consider that thin slabs might suffer from "quantum confinement" effects, so it is important to look at the changes of the electronic properties if you are interested in accurat

[QE-users] Convergence tests for slabs

2022-12-19 Thread Léon Luntadila Lufungula
Dear QE users, I'm creating a slab for studying adsorption of small molecules (around 6-8 atoms in length) and want to converge both the slab thickness and vacuum width. However, I don't fully understand how to do this properly... For the convergence of the slab thickness, I was thinking about