Dear
<span style="color: rgb(32, 33, 36); font-family: Roboto, Arial, sans-serif; letter-spacing: 0.25px; white-space: nowrap;">Johann,</span><div><font color="#202124" face="Roboto, Arial, sans-serif"><span style="letter-spacing: 0.25px; text-wrap-mode: nowrap;">Thank you for your reply. Previously, I used the gamma point, and the calculations converged. Now, I am attempting to use K-points.<br /></span></font><br /></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Monday, July 27, 2026 at 10:05:00 PM UTC+5:30 Johann Pototschnig 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;"><div>You can try to increase the cutoff and check its convergence for the gamma point. </div><div> Have you tried restarting with the converged gamma point density? </div><div><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Monday, July 27, 2026 at 9:43:33 AM UTC+2 Vasanthapandiyan M 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"><p style="box-sizing:border-box;margin:0px;padding:0px"><font size="3" face="Sans Serif" color="#000000">Dear colleagues,</font></p><p style="box-sizing:border-box;margin:0px;padding:0px"><font color="#000000"><font size="3" face="Sans Serif"> </font><span style="font-family:"Sans Serif";font-size:medium">I have been trying to run a geometry optimization for an FeN4 slab using K points set to 2x2x1. I have experimented with different cutoff values (500 and 600), but the optimization has not converged. I utilised the Orbital Transformation (OT) method with the Gamma point, which converged successfully. However, I would like to compare the free energy differences obtained from VASP and CP2K (both with 2×2×1 k-points).</span></font></p><p style="box-sizing:border-box;margin:0px;padding:0px"><font color="#000000"><br></font></p><div><font face="Sans Serif" size="3" color="#000000">I already tried playing with different cutoffs, mixing parameters, smearing temperature values, and lowering cutoff values, but it is not working. Here, I have attached my input files. </font></div><div><br></div><div><font size="3" face="Sans Serif" color="#000000">Any suggestions would be greatly appreciated.</font></div><div><font size="3" face="Sans Serif" color="#000000"><br></font></div><div><font size="3" face="Sans Serif" color="#000000">Regards,</font></div><div><font size="3" face="Sans Serif" color="#000000">Vasanth</font></div></blockquote></div></blockquote></div>
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