<div dir="ltr"><span style="font-family:arial,sans-serif;font-size:13px">Greetings, </span><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">I am doing a calculation to find the effective U for NiO as outlined in the guide by Madsen and Novak (2007).</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"><div>I am following all the steps as closely as possible using both GGA and LDA. With the GGA calculation, I am getting convergence of F_eff ~ .494 Ry (6.72 eV) with k-mesh set to around 10 in each direction. The value that I was expecting was .438 Ry (5.96 eV), using (4) from the paper on magnetite by the same authors.</div>
<div><br></div><div>In the case of using LDA, I arrive at F_eff ~ .475 Ry (6.46 eV) with less k points (7 kpoints in each direction). All these values have RKmax = 5.</div><div><br></div><div>I have tried many things to arrive at a lower value, and the discrepancy seems a bit large.</div>
<div><br></div><div>I am using version wien2k/11.1. My commandline:</div><div><br></div><div>runsp_lapw -p -i 100 -cc .0001 -ec .0001 -I<br></div><div><br></div><div>Does anyone have any suggestions on how to reproduce the results?</div>
<div><br></div><div>Sincerely, </div><div><br></div><div>Oliver Albertini</div></div></div>