<div>Dear cp2k-users,</div><div><br /></div><div>I am trying to run a geometry optimization on a metal surface using multiple k-points (4x4x1 Monkhorst-Pack grid) and a surface dipole correction in the direction perpendicular to the surface (using the DFT%SURFACE_DIPOLE_CORRECTION and SURF_DIP_DIR keywords). However, when doing so, the following error message appears:<br /></div><div><br /></div><div>' Dipole correction needs more vacuum space above the surface' <br /></div><div><br /></div><div>Adding more vacuum (increasing from about 38 A to about 63 A), as suggested by the error message, does not solve the issue, but removing the surface dipole correction does. <br /></div><div><br /></div><div>I am therefore wondering if the surface dipole correction is indeed incompatible with a calculation sampling at more than the gamma-point, as DFT calculations with multiple k-points are fairly new to cp2k. Combining the surface dipole correction with only gamma-point sampling doesn't yield any problems. Is there a workaround for this problem?</div><div><br /></div><div>The input files have been attached below.</div><div><br /></div><div>Many thanks,</div><div><br /></div><div>Bibiana Turkcan<br /></div>
<p></p>
-- <br />
You received this message because you are subscribed to the Google Groups "cp2k" group.<br />
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>.<br />
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/49724a44-ea23-42da-9dcf-b1df92bbb6c7n%40googlegroups.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/49724a44-ea23-42da-9dcf-b1df92bbb6c7n%40googlegroups.com</a>.<br />