<div dir="ltr">I am not an expert, but I can tell you what I had earlier done with graphene. I increased the c vector gradually from 10 Angstrom to 20 Angstrom with a step of 2 Angstrom and run relaxation calculation. Then I checked the final energy and the point where energy was finally converged. I believe that should also work with the Ni super cell.<div><br></div><div>Khalid Ibne Masood</div><div>M.Sc student</div><div>BUET</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Nov 29, 2014 at 6:51 AM, nadia cherifi <span dir="ltr"><<a href="mailto:nadoulam83@yahoo.fr" target="_blank">nadoulam83@yahoo.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div dir="ltr" align="left">Dears readers;<br></div><div dir="ltr" align="left"><br></div><div dir="ltr" align="left">I inform you that I have just started to use the PWscf code,so, I<span> am r</span><span>eal</span><span>ly </span><span>not trying</span><span> to annoy y</span><span>ou withe my question; I </span><span>am</span><span> just</span><span> t</span>rying to understand, so,I want to create a supercell from Ni (100) :(2*2) and I have a problem to optimize the vacuum which is between two slabs, I will be grateful if somebody can help me,,</div><div dir="ltr" align="left"><br></div><div dir="ltr" align="left">Thanks <br></div><div dir="ltr"><br></div></div><br>_______________________________________________<br>
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