[Pw_forum] On the size of Monkhorst-Pack grid for phonon calculation

2016-04-04 Thread Yi Wang
Dear everyone, What would be the appropriate value for the size of Monkhorst-Pack grid for phonon calculation?(Such as for primitive cell of bcc/fcc metals) In the published papers, I saw it is usually very detailed on SCF or relax parameters but seldom saw on this. Could you tell me how

[Pw_forum] why does band calculation takes too long

2016-04-04 Thread Eduardo Menendez
Hi, I wonder why is the band calculation much longer than a scf calcuation. I did a calculation for a 64-atoms supercell using 20 cpu cores. In summary, I did 1) SCF calculation with only gamma point, run in two minutes. 2) Non-self-consistent band calculation with 27 k-points. In the nscf

[Pw_forum] exchange-correlation and pseudopotential

2016-04-04 Thread Uri Argaman
Dear QE users and developers I want to do calculation with MGGA_MS functional for titanium. I do not find pseudopotential with this XC (ultrasoft is preferred). How can I do such calculation? Is the best way to use pslibrary? Is it reasonable to work with different XC than used in the