Re: [QE-users] Question rgd. q grid for HSE calculations

2021-02-02 Thread Shivesh Sivakumar
Dear Giuseppe, Thank you very much for your inputs in this regard. Best, Shivesh On Tue, Feb 2, 2021 at 1:42 AM Giuseppe Mattioli < giuseppe.matti...@ism.cnr.it> wrote: > > Dear Shivesh Sivakumar > I have used a 1x1x1 q grid together with HSE or B3LYP in the case of > innumerable large systems

Re: [QE-users] Question rgd. q grid for HSE calculations

2021-02-02 Thread Giuseppe Mattioli
Dear Shivesh Sivakumar I have used a 1x1x1 q grid together with HSE or B3LYP in the case of innumerable large systems since 2009, with quite satisfactory results. Tests made by yourself are the best when you are not sure. You can do as I did years ago: start from the unit cell of a very

Re: [QE-users] Question rgd. q grid for HSE calculations

2021-02-01 Thread Shivesh Sivakumar
Hello users, I was just wondering if anyone had any inputs on this: Using a 1x1x1 q grid for HSE calculations in the case of 'large non-metallic systems'. I would greatly appreciate any points or resources regarding this. Sincerely, Shivesh Sivakumar Graduate Teaching Assistant Materials Science

[QE-users] Question rgd. q grid for HSE calculations

2021-01-29 Thread Shivesh Sivakumar
Hello users, I was seeking a clarification in the documentation for calculation of the exact exchange in HSE calculations. Paraphrasing what's mentioned in the documentation: Specifically, in the case of large non-metallic systems, it is reasonable that NQS can be set to 1 (where NQS =