<div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">such possibility may be useful if you want to take into account<br>
isotopic effects, for instance</blockquote><div><br></div><div>Thank you, Prof. Paolo. I got this point, but I still don't how to set it while using VCA. For example, in SrTiO3 bulk material, if I want to mix O with N(namely nitrogen dopping) , after getting a mixed PP's with virtual.x, the atomic weight of oxygen in <span style="font-family:arial,sans-serif;font-size:14px">ATOMIC_SPECIES tag</span> is hard to determine if I intend to do phonon calculations.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Regards!<br><br><div class="gmail_quote">2013/11/19 Paolo Giannozzi <span dir="ltr"><<a href="mailto:paolo.giannozzi@uniud.it" target="_blank">paolo.giannozzi@uniud.it</a>></span><br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div class="im">On Tue, 2013-11-19 at 08:52 +0800, Yue-Wen Fang wrote:<br>
<br>
> In quantum espresso, what is determined by atomic weight?<br>
<br>
</div>molecular dynamics and dynamical matrices (phonons)<br>
<br>
> In other words, why the atomic weight can be set freely by users.<br>
<br>
such possibility may be useful if you want to take into account<br>
isotopic effects, for instance<br>
<div class=""><div class="h5"><br>
P.<br>
<br>
> Thank you.<br>
><br>
><br>
> 2013/11/18 Paolo Giannozzi <<a href="mailto:paolo.giannozzi@uniud.it">paolo.giannozzi@uniud.it</a>><br>
> On Mon, 2013-11-18 at 19:03 +0800, Yue-Wen Fang wrote:<br>
><br>
> > Additionally, when using mixed PPs generated by virtual.x,<br>
> > how to determine the atomic weight?<br>
><br>
><br>
> atomic weights are used only for molecular dynamics<br>
> and phonon calculations. Unless you want to perform<br>
> such calculations using VCA (likely not a good idea)<br>
> you may choose whatever atomic weight you like<br>
><br>
> P.<br>
> --<br>
> Paolo Giannozzi, Dept. Chemistry&Physics&Environment,<br>
> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
> Phone +39-0432-558216, fax +39-0432-558222<br>
><br>
> _______________________________________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
><br>
><br>
><br>
><br>
> --<br>
> ------------------------------------------------------------------------------------------------------------<br>
> Yue-Wen FANG, PhD candidate<br>
> Key Laboratory of Polar Materials and Devices, Ministry of Education<br>
> East China Normal University<br>
><br>
><br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
<br>
--<br>
Paolo Giannozzi, Dept. Chemistry&Physics&Environment,<br>
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
Phone +39-0432-558216, fax +39-0432-558222<br>
<br>
_______________________________________________<br>
Pw_forum mailing list<br>
<a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
<a href="http://pwscf.org/mailman/listinfo/pw_forum" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">------------------------------------------------------------------------------------------------------------<div>Yue-Wen FANG, PhD candidate<br>
<div><a href="http://clpm.ecnu.edu.cn/" style="font-family:arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" target="_blank">Key Laboratory of Polar Materials and Devices, Ministry of Education</a><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)"><a href="http://english.ecnu.edu.cn/" target="_blank">East China Normal University </a></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<br></div></div><div><br></div><div><br></div></div></div>
</div></div>