<div dir="ltr"><div class="gmail_extra">Dear Layla</div><div class="gmail_extra"><br></div><div class="gmail_extra">You said that "<span class="" style="font-family:arial,sans-serif;font-size:13px">ecutvcut is a parameter which is not strictly bonded to hybrid functional parameters, but to strongly anisotropic supercells" </span></div>
<div class="gmail_extra">So, why do we have ecutvcut=0.7 in the PBE0 example for bulk Si?</div><div class="gmail_extra"><br></div><div class="gmail_extra"><br></div><div class="gmail_extra"><br></div><div class="gmail_extra">
<br><div class="gmail_quote">On Fri, Nov 23, 2012 at 2:31 AM, Layla Martin-Samos <span dir="ltr"><<a href="mailto:lmartinsamos@gmail.com" target="_blank">lmartinsamos@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div id=":155">Dear Leonardo and Jianpeng, the "issue" is that HSE contain only the shortrange part of coulomb potential for the fock term (thas why HSE contain an exponential with a screening lenght). Ecutvcut, spehrical cutoff and all similar tricks APPLY ONLY for the "REAL" Coulomb potential, the FULL Coulomb potential. So, one has to be very careful when dealing with hybrids that do not contain the full coulomb potential.<div>
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Amin Torabi<br>Ph.D. Student<br>Chemistry Dept.<br>Western University<br>London, On Canada, N6A 5B7<br><span style="font-family:'Droid Sans',arial,sans-serif;font-size:13px;border-collapse:collapse;color:rgb(32,32,32)">Phone: <a value="+15196612111" style="color:rgb(103,117,58)">519-661-2111</a> Ext: 87871</span><div>
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