<div dir="ltr">Hi,<br><br>thank you. The way I understood it is that to get better
results, I can either increase the volume of real-space
the integration happens over (MULTIPLE_UNIT_CELLS), or can move to a model in the reciprocal lattice and sample the 1st BZ at high(er)
resolution? That means that for such a small system, what I effectively did in my test was the same as if I used a too coarse k-point grid? The thing that confused me was that most energies were very similar, just that one term wildly different.<br><br>For my test system, I need 27 supercells to get the kpt
energies, but even more for correct stresses - but at about 1/10th theĀ computation
time and a little less memory/proc that could be worth it. But now I
have all quantities output for the replicated atoms as well, making
things a bit harder to use... guess I'll stick with k-point sampling. Is
there a break-even point regarding volume or atom/electron count where
one method is generally faster than the other?<br><br>As a related question, is there a way to specify an M-P grid using point spacing instead of point counts?<br><br>Best regards,<br>Sebastian<br></div>