Dear All,<div><br></div><div><div>I did LDA+U calculation on Ni3V2O8, and got the U of V (vanadium) -1.7 eV. I am not sure if it is reasonable. I checked the occupation number of vanadium. All d orbitals are filled almost evenly. Whereas, I expected to see only 3 occupied orbitals. I tried to set inital occupation number by starting_ns_eigenvalue. But the results are the same after iterations. Dr. Kulik mentioned that "if 3d and 4s are comparably filled and their energies are close, then 3d and 4s shells should be included directly in the U calculation". So I am wondering if this is the case for vanadium and can QE calculate U with both 3d and 4s shells? <span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">Thank you in </span><span class="il" style="background-color:rgb(255,255,204);color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.800000190734863px">advance</span><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"> for any help you can provide!</span></div>
<div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></span></div><div> spin 1</div><div><div> eigenvalues:</div><div> 0.441 0.448 0.480 0.505 0.513</div>
<div> eigenvectors:</div><div> 0.813 0.183 0.000 0.004 0.000</div><div> 0.012 0.018 0.028 0.211 0.731</div><div>
0.001 0.001 0.576 0.248 0.174</div><div> 0.001 0.001 0.394 0.533 0.071</div><div> 0.174 0.797 0.001 0.004 0.024</div><div> occupations:</div><div> 0.442 0.003 0.002 -0.003 -0.002</div><div> 0.003 0.509 -0.006 -0.001 0.011</div>
<div> 0.002 -0.006 0.492 -0.013 -0.002</div><div> -0.003 -0.001 -0.013 0.496 0.001</div><div> -0.002 0.011 -0.002 0.001 0.448</div></div><div><br></div><div><br></div>
<div><br></div>-- <br> Best Regards.<br> Peng <br>
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