<div>Dear You,</div><div><br></div><div>A few pointer that can improve the scf convergence:</div><div> - decrease EPS_DEFAULT to at least 1e-12</div><div> - increase the smearing temperature</div><div> - increase the cutoff, 300 is rather low here</div><div> - use BROYDEN_MIXING</div><div> - I found that ALPHA between 0.15 and 0.2 is often a good choice for metallic systems</div><div> - you can use far fewer ADDED_MOS, 20 is plenty here</div><div><br></div><div>Another
issue you should address is the periodicity. The settings in
&POISSON and &CELL have to match unless you really know what you
are doing. The WAVELET solver allows for slab periodicity, see
https://manual.cp2k.org/cp2k-7_1-branch/CP2K_INPUT/FORCE_EVAL/DFT/POISSON/WAVELET.html.</div><div><br></div><div>The
attached input (ignoring the problem with the periodicity) converged
within 120 iterations. This can probably still be improved upon.</div><div><br></div><div>Cheers,</div><div>Fabian<br></div><div><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Friday, 13 November 2020 at 17:15:05 UTC+1 Y Lu wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Google didn't allow to post with plain text attachments!<br><br></blockquote></div>