<br>Hi Paolo<br><br><div class="gmail_quote">On Fri, May 9, 2008 at 11:05 AM, Paolo Giannozzi <<a href="mailto:giannozz@nest.sns.it" target="_blank">giannozz@nest.sns.it</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>Javier Antonio Montoya wrote: <br></div></blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">as I already mentioned several times in this forum: the problem with<br>
such elements is not much the pseudopotential (which IS anyway a<br>
problem: generating ultrasoft PP's for those elements is a full-time<br>
job) but the reliability of the current DFT. Years ago I tried something<br>
with Pr, with less than moderate success. I'll try to locate those<br>
files if they still exists. <br></blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Paolo<br>
<font color="#888888">--</font></blockquote><div><br>Thanks a lot, I would really appreciate if you can find your Pr pseudo, I am willing to take that risk. Same regarding the other ones, in case somebody already have them. The matter is that experimentally we already have the Raman and Infrared peak positions, plus the lattice constants, therefore, it will be pretty easy to decide whether or not the results make some sense and then, to use them to support some microscopic analysis of the physics that is going on in our samples. Each material contains a single rare-earth element but it also contains oxygen and iron, I think there isn't a big risk on using the ones available from the repository in PWscf.org for those other two, therefore I just need to satisfy the NLCC, Van-US, PBE requirement also for the rare-earths in order to make them match.<br>
<br>Cheers,<br><br>Javier.<br><br></div></div><br>