Thank you very much Lorenzo!<br><br clear="all">Giovani<br>
<br><br><div class="gmail_quote">2012/3/4 Lorenzo Paulatto <span dir="ltr"><<a href="mailto:Lorenzo.Paulatto@impmc.upmc.fr">Lorenzo.Paulatto@impmc.upmc.fr</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">On Mon, 05 Mar 2012 00:13:14 +0100, Giovani Faccin<br>
<<a href="mailto:faccin.giovani@gmail.com">faccin.giovani@gmail.com</a>> wrote:<br>
<br>
> Dear QE-Users,<br>
><br>
> Could:<br>
><br>
> K_POINTS{gamma}<br>
><br>
> be somehow made equivalent to:<br>
><br>
> K_POINTS {automatic}<br>
> nk1 nk2 nk3 sk1 sk2 sk3<br>
><br>
> ? If so, how should one set the nk and sk values above to have the<br>
> calculation performed at gamma only (or if not possible, at least<br>
> including gamma), while using the second syntax?<br>
<br>
<br>
</div>The followng syntax performs a calculation with Gamma point sampling:<br>
K_POINTS automatic<br>
1 1 1 0 0 0<br>
<br>
it is however not equivalent to<br>
K_POINTS gamma<br>
<br>
The latter uses the fact that wavefunctions at Gamma are (can be set) real<br>
to save a lot of memory and cpu time. In order to do so it uses several<br>
tricks that are not compatible with all the post-processing and additional<br>
codes. Notably, the phonon code does not work with the gamma-only sampling<br>
tricks.<br>
<br>
bests<br>
<br>
P.S. note that all the curly braces are not necessary, they also do not<br>
hurt<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
--<br>
Lorenzo Paulatto IdR @ IMPMC/UPMC CNRS & Université Paris 6<br>
phone: <a href="tel:%2B33%20%280%291%2044275%20084" value="+33144275084">+33 (0)1 44275 084</a> / skype: paulatz<br>
www: <a href="http://www.impmc.upmc.fr/%7Epaulatto/" target="_blank">http://www.impmc.upmc.fr/~paulatto/</a><br>
mail: 23-24/4é14 Boîte courrier 115, 4 place Jussieu 75252 Paris Cédex 05<br>
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</font></span></blockquote></div><br>