<div><div class="gmail_msg">Dear Dr. German Samolyuk,</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">Thank you for the detailed reply. I checked your example but I do not understand how do you calculate the zed and config values according to the vacancies? For mixture of Cu with 1/29 i was expecting the zed value to be 28.</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">Best regards,</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">Novendra Novendra</div></div><div><div class="gmail_msg"><br class="gmail_msg"><div class="gmail_quote gmail_msg"><div class="gmail_msg">On Tue, Apr 4, 2017 at 3:29 PM German Samolyuk <<a href="mailto:samolyuk@gmail.com" class="gmail_msg" target="_blank">samolyuk@gmail.com</a>> wrote:<br class="gmail_msg"></div><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_msg">Dear <span style="font-size:12.8px" class="gmail_msg">Novendra Novendra,</span><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg"><br class="gmail_msg"></span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">The only way how to do it within pseudopotential method I found, was to make pseudopotential with both zed and config values equal to fractional number. For example, for Cu: zed=28.9, config='[Ar] 3d9.5 4s1.4 4p0.0' corresponds to mixture of Cu with 1/29 vacancies.</span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">It's not exactly the same as mixing with "empty" pspot, but more like rigid band approximation for particular component. </span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">If you need do do something more accurate, probably, one of the CPA KKR packages will be more appropriate.</span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">One more comment regarding modeling vacancies with VCA. You probably should remember that even in closed packed structures like most of the metals relaxation of surrounding vacancy atoms positions is significant. This effect is not included within VCA approach.</span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg"><br class="gmail_msg"></span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">Best,</span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg"><br class="gmail_msg"></span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">German Samolyuk</span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg"><br class="gmail_msg"></span></div><div class="gmail_msg"><span style="font-size:12.8px" class="gmail_msg">ORNL</span></div></div><div class="gmail_extra gmail_msg"><br class="gmail_msg"><div class="gmail_quote gmail_msg"></div></div><div class="gmail_extra gmail_msg"><div class="gmail_quote gmail_msg">On Mon, Apr 3, 2017 at 2:34 PM, Novendra Novendra <span class="gmail_msg"><<a href="mailto:novendra.andra@gmail.com" class="gmail_msg" target="_blank">novendra.andra@gmail.com</a>></span> wrote:<br class="gmail_msg"></div></div><div class="gmail_extra gmail_msg"><div class="gmail_quote gmail_msg"><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_msg">Dear QE developers,<div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg"><br class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg"></div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">I am trying to prepare input file for a system with a positional disorder. I have seen some example where VCA can be applied for system with substitional disorder, where in that case a virtual PP can be prepared by mixing PP of different elements. In the case of positional disorder, is it possible to prepare a virtual PP by mixing with an "empty" PP? </div></div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg"><br class="gmail_msg"></div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">Thank you,</div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg"><br class="gmail_msg"></div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">Novendra Novendra</div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">Ph.D Student,</div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">Department of Chemical Engineering & Materials Science</div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg">University of California, Davis</div><div class="m_-2350811250902591071m_-669303539678498494m_-7735300850203887648gmail_msg gmail_msg"><br class="gmail_msg"></div>
<br class="gmail_msg"></blockquote></div></div><div class="gmail_extra gmail_msg"><div class="gmail_quote gmail_msg"><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">_______________________________________________<br class="gmail_msg">
Pw_forum mailing list<br class="gmail_msg">
<a href="mailto:Pw_forum@pwscf.org" class="gmail_msg" target="_blank">Pw_forum@pwscf.org</a><br class="gmail_msg">
<a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" class="gmail_msg" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br class="gmail_msg"></blockquote></div><br class="gmail_msg"></div>
_______________________________________________<br class="gmail_msg">
Pw_forum mailing list<br class="gmail_msg">
<a href="mailto:Pw_forum@pwscf.org" class="gmail_msg" target="_blank">Pw_forum@pwscf.org</a><br class="gmail_msg">
<a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" class="gmail_msg" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a></blockquote></div></div></div>