<div dir="ltr"><div><div><div>Dear Martin Gmitra,<br><br></div> Some time ago, we had some comments about this issue in the mailing list. Please, take a look at <a href="http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg10697.html">http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg10697.html</a> . Nevertheless, your specific questions should be answered by more experienced users/developers.<br></div> All the best,<br></div> Luis<br><br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-02-05 18:46 GMT-02:00 Martin Gmitra <span dir="ltr"><<a href="mailto:martin.gmitra@gmail.com" target="_blank">martin.gmitra@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Wien2k developers,<br>
<br>
We are observing underestimating trend of spin-orbit coupling<br>
splittings of Gamma_{15} bands in zinc-blende semiconductors.<br>
<br>
For instance in GaAs, the Gamma_{15v} splits to Gamma_{8v} and<br>
Gamma_{7v} by the values of about 0.29 eV, while experiment gives 0.34<br>
eV. PBE calculations gives 0.32 eV. Similar one sees for Gamma_{15c}<br>
which splits due to spin-orbit to Gamma_{8c} and Gamma_{7c} where mBJ<br>
gives 0.156 eV and PBE 0.181 eV. This one can compare to 0.174 eV from<br>
GW+SOC calculations [PRL 96, 086405].<br>
<br>
In PRB 82, 205212 you present two implementations of mBJ, within<br>
Wien2k and VASP. Could you please provide information whether both the<br>
implementations provide the same spin-orbit splittings of Gamma_{15}<br>
states?<br>
<br>
In case they are the same, which part of the Becke-Johnson approach<br>
can be responsible for such a reduction?<br>
<br>
Best regards,<br>
Martin Gmitra<br>
Uni Regensburg<br>
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