<div dir="ltr">Dear Dr. Matteo,<div><br></div><div>Thanks a lot. It indeed helped me. May I ask you few more things.</div><div><br></div><div>1. Which 'U', among the two ways, I need to consider (for example, for my DMFT calculations) for the TM atom?</div><div> (a) U obtained by considering Hubbard_alpha only for the TM atom</div><div> (b) U obtained by considering Hubbard_alpha on both TM atom and O atom.</div><div>2. Why we need to shift the atoms to origin always?</div><div>3. Can we calculate the onsite J using the QE?</div><div>4. Are there any tutorials for calculating DFT+U+V (which you have described in the last parts of chapter 4 in the book Correlated electrons: From Models to Materials)?</div><div><br></div><div>Thanks a lot for your help and support,</div><div>Sincerely,<br>Sharma.<br><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><span style="color:rgb(204,51,204)">*******************************************************</span><br><font><b style="color:rgb(51,51,255)">Chaitanya Sharma,</b></font><br><b><span style="font-family:'times new roman',serif">Prof. Pati'</span></b>s group,<br><span style="color:rgb(56,118,29)">Chemistry and Physics Materials unit</span>,<br><span style="color:rgb(255,0,0)">JNCASR</span>, BANGLORE,<br>Lab:: (080-2208) <span style="color:rgb(0,0,255)">2581, 2809</span><br><a href="https://sites.google.com/site/sharmasrkcyamijala/" target="_blank">https://sites.google.com/site/sharmasrkcyamijala/</a><br><span style="color:rgb(204,51,204)">*********************************************************</span><br></div></div></div>
<br><div class="gmail_quote">On Tue, Nov 18, 2014 at 11:41 PM, SRKC Sharma Yamijala <span dir="ltr"><<a href="mailto:sharmajncasr@gmail.com" target="_blank">sharmajncasr@gmail.com</a>></span> wrote:<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 dir="ltr">Dear PW members,<div><br></div><div>I have gone through the tutorials of LDA+U available online (mainly of Matteo Cococcioni and also his PRB 2005 paper). I am interested in calculating the U for the system SrVO3 and others. If I correctly follow the tutorial on NiO, to calculate U, I need calculate the scf with 2*2*2 supercell (and with 4*4*4 etc. till U convergence) by keeping Ni at the origin once and by keeping O at the origin next. If I follow the above and consider the 2*2*2 supercell then the number of atoms in my system will be 40.</div><div><br></div><div>But, I am guessing (I may be wrong) that supercell is considered because of the AFM nature of NiO ground state. So, can someone please clarify whether considering supercell is required for non-magnetic/Ferro-magnetic systems also or not?</div><div><br></div><div>Thanking you for your support,</div><div>Sincerely,</div><div>Sharma.<div><div><div dir="ltr"><span style="color:rgb(204,51,204)">********************************************************</span><br><font><b style="color:rgb(51,51,255)">Chaitanya Sharma,</b></font><br><b><span style="font-family:'times new roman',serif">Prof. Pati'</span></b>s group,<br><span style="color:rgb(56,118,29)">Chemistry and Physics Materials unit</span>,<br><span style="color:rgb(255,0,0)">JNCASR</span>, BANGLORE,<br>Lab:: (080-2208) <span style="color:rgb(0,0,255)">2581, 2809</span><br><a href="https://sites.google.com/site/sharmasrkcyamijala/" target="_blank">https://sites.google.com/site/sharmasrkcyamijala/</a><br><span style="color:rgb(204,51,204)">*********************************************************</span><br></div></div></div>
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