<div dir="ltr"><div><div><div><div><div><div>Dear Paolo,<br><br></div>Many thanks for your reply,<br><br></div>The system under study is graphene/Ag(111)/Ni(111). so there are two interfaces and I expect it to be converged in too much iterations at the first step (from experience).<br></div>I tried to do it with 50 and 400 cutoffs and also 12 12 1 kpoints but the system was not converged after 400 iterations.<br></div>The investigations were done using LDA, but we needed the results to be evaluated by HYB_FUNCs.<br>what are your recommendations for dealing with this problem?<br><br></div>Thanks,<br><br></div>Mohammad<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 19, 2016 at 10:38 PM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:p.giannozzi@gmail.com" target="_blank">p.giannozzi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span class="">On Mon, Jan 18, 2016 at 8:09 AM, Mohamad Moadeli <span dir="ltr"><<a href="mailto:mohammad.moaddeli@gmail.com" target="_blank">mohammad.moaddeli@gmail.com</a>></span> wrote:<br></span><div class="gmail_extra"><div class="gmail_quote"><span class=""><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div> EXX: setup a grid of 576 q-points centered on each k-point<br></div></div></div></div></div></div></blockquote><div><br></div></span><div>note that all these wavefunctions have to be stored in memory ...<span class=""><br><br> kinetic-energy cutoff = 70.0000 Ry<br> charge density cutoff = 500.0000 Ry<br> cutoff for Fock operator = 280.0000 Ry<br><br></span>... and that you have a rather big cutoff<span class=""><br><br> convergence has been achieved in 222 iterations<br><br></span></div><div>222 iterations is definitely too much<span class="HOEnZb"><font color="#888888"><br><br></font></span></div><span class="HOEnZb"><font color="#888888"><div>Paolo<br></div></font></span></div><span class="HOEnZb"><font color="#888888"><br>-- <br><div><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>
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