<div dir="ltr">Dear Ireneusz,<div><br></div><div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">It does<br>not converge with scalar-relativistic pseudopotential. However, with<br>full-relativistic approach and cg diagonalization the convergence of<br>5D-5 is achievable but<br>cannot go lower. The problem with scalar-relativistic calculations<br>occurs in the first iteration where scf accuracy skyrockets above the<br>total energy.</blockquote><div><br></div><div>Maybe you have a pseudopotential issue for one of the elements in your system. Why not try using different pseudopotentials? there is no need to stick to PAW.</div></div><div>Try using ultrasoft or norm-conserving pseudopotentials.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Authors of the paper used VASP but it should be possible in Quantum<br>Espresso.</blockquote><div><br></div><div>This is not always the case, do not assume this. </div><div>Pseudopotentials are an important part of the calculation, which are different sets for VASP and QE. </div><div>The calculation and the code implementation are also different.</div><div><br></div><div>Best regards,</div><div>Alpin N. Tatan</div><div>The University of Tokyo</div><div><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, Jul 6, 2026 at 4:26 PM <<a href="mailto:buganski@agh.edu.pl">buganski@agh.edu.pl</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear All,<br>
<br>
I have been trying to reproduce the results from this paper:<br>
<a href="https://www.mdpi.com/1996-1944/18/11/2637" rel="noreferrer" target="_blank">https://www.mdpi.com/1996-1944/18/11/2637</a> . The authors calculated the<br>
bands structure with and without spin-orbit coupling to show broken<br>
time-reversal symmetry. The structure under consideration is hexagonal<br>
MnTe phase with three atoms in a unit cell (cif included)<br>
I started the scf calculations with nspin=2 using pbe-paw<br>
pseudopotential by A. Dal Corso (names in the qe input file). It does<br>
not converge with scalar-relativistic pseudopotential. However, with<br>
full-relativistic approach and cg diagonalization the convergence of <br>
5D-5 is achievable but<br>
cannot go lower. The problem with scalar-relativistic calculations<br>
occurs in the first iteration where scf accuracy skyrockets above the<br>
total energy.<br>
I tired lowering the ecutrho to 505, using different mixing_beta, from<br>
0.1 to 0.7 or using different mixing_mode. I also tried changing<br>
startingwfc to 'atomic' what makes computation stable for first few<br>
iterations and than it once again disconverge.<br>
Authors of the paper used VASP but it should be possible in Quantum<br>
Espresso.<br>
<br>
Can you give me a hint what should I try to solve this issue? The dos<br>
computed with soc looks to work as it is similar to what is shown in the<br>
paper (I did not set J parameter because it is not implements in QE for<br>
PAW pseudo). But I would like to see the time-reversal symmetry being<br>
broken for lsda calculations.<br>
<br>
Input and output files for one of the tests is attached. I use QE v. 7.3<br>
on the cluster using 8 nodes with 48 cores.<br>
<br>
If I missed important information to resolve the issue, please, message<br>
me.<br>
<br>
Best regards,<br>
Ireneusz Buganski<br>
AGH University of Krakow_______________________________________________________________________________<br>
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