<div dir="ltr"><div>Dear William,</div><div><br></div><div>the DFT+U+V code is not yet public. We have had some technical difficulties in porting it to the distributed version of QE so we haven't been able to complete the task yet. We will work on this in the near future. <br></div><div>Best regards,</div><div><br></div><div>Matteo</div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno lun 9 dic 2019 alle ore 04:22 William Hewett <<a href="mailto:williamholmeshewett1@gmail.com">williamholmeshewett1@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Hi QE users,</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">I’m working on some calculations on rare earth systems,
specifically rare earth nitrides. The most successful calculations so far have
been using the LDA+U+V method (applying different U corrections on f and d
channels on the same atomic species simultaneously). As far as I can tell this
is not possible currently in QE without manually editing the code.</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">I’ve investigated this a bit and found forum posts going
back to 2014 asking the same question, with the answer that LDA+U+V it should
be ‘available soon’.</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"><a href="https://lists.quantum-espresso.org/pipermail/users/2014-June/029818.html" style="color:blue" target="_blank">https://lists.quantum-espresso.org/pipermail/users/2014-June/029818.html</a></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">I’ve also had a dig around in the code and found various
references to the 'Hubbard_V' parameter specifically in hp_summary.f90 which
are commented out.</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">There also are various group who have achieved LDA+U+V in QE
I guess by editing the code themselves.</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">J. Phys.: Condens. Matter 22 (2010) 055602</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Computational Materials Science 95 (2014) 263–270</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Does anyone have an idea of when LDA+U+V may be available in
the stable release of QE? Or can anyone offer some guidance on manually editing
the code to make this possible?</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Kind regards</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:Calibri,sans-serif">Will Hewett</p></div>
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