Re: [QE-users] Convergence problem with hydroxide

2024-01-24 Thread Giuseppe Mattioli
Dear Jeremy It is not a technical problem, it is a theoretical one. negative ions in gas phase generally yield unbound excess electrons leading to weird results when computed at the GGA level of theory. Of course water stabilizes OH-, and also exact exchange if you use a hybrid

[QE-users] Convergence problem with hydroxide

2024-01-24 Thread RABONE Jeremy
Hello, I have just started a project using QE, and have a question regarding a hydroxide ion in a box. When I first tried to do a relaxation with conv_thr = 1.0d-8, it started off like it was going to converge and then suddenly the convergence went all over the place. Changing all of the