Would a value of 600 ry be exaggerated? Also, perhaps DFTD3 requires higher cutoffs?<br /><br /><div class="gmail_quote"><div dir="auto" class="gmail_attr">Il giorno venerdì 17 febbraio 2023 alle 14:58:55 UTC+1 Simone Ritarossi ha scritto:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Dear Marcella,<br><br>I chose the cutoff as the minimum possible. Without COMVEL_TOL there is drifting (along x) that must not be there. I would like to solve the drifting without the forcing of COMVEL_TOL (e.g. by increasing the cutoff so that the forces can be calculated better? )<br>The noisygamma was chosen from previous simulations on almost identical systems, as advised by the supervisor.<br>Why do you say that "
Your settings for SGCPMD look strange." ?<br><br>Many thanks in advance,<br>Simone<br><div class="gmail_quote"><div dir="auto" class="gmail_attr">Il giorno venerdì 17 febbraio 2023 alle 10:12:09 UTC+1 Marcella Iannuzzi ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Simone,<div><br></div><div>The cutoff looks indeed small. </div><div>Does the COM drift by BOMD? Have you tried without COMVEL_TOL? </div><div>Your settings for SGCPMD look strange. </div><div>Have you run the needed tests for the nosy-gamma to find the right parameters?</div><div><br></div><div>Regards</div><div>Marcella<br><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Friday, February 17, 2023 at 2:25:00 AM UTC+1 Simone Ritarossi 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">Dear cp2k-users,<br><br>I have a problem with COM (center of mass) drifting (along x). I'm running a LANGEVIN (SGCPMD) on my
heterostructure, consisting of a GST + TiTe2 (633 atoms),
where I consider van der Waals interactions (with DFT-D3). The cutoff is 320 Ry: maybe is it too small? Maybe at a temperature of 600K a gamma of 1.9e-3 is too big?<br><br>I noticed that by using COMVEL_TOL=0 I have the following behaviour: the temperature of the whole system does not correspond to the average (weighted according to the number of atoms) of the temperatures of the individual atomic species. <br><br><br>Many thanks in advance,<br>Simone<br></blockquote></div></blockquote></div></blockquote></div>
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