<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">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>