<div dir="ltr">Dear Wien2k Community:
<div><br></div><div>I wonder if mBJ can be useful in calculation of polarization-related properties. There are narrow gap semiconductors (like InN), which turn into semi-metals with a pure LDA. For polarization calculations we need a finite band gap, so LDA+mBJ could be an option.</div>
<div><br></div><div>However, it was mentioned on the list (<a href="http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg07108.html">http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg07108.html</a>) that mBJ results in a more ionic electron density. I performed a test for GaN: LDA polarization is 0.030 C/m2 vs 0.035 C/m2 for LDA+mBJ. So, it is indeed more ionic.</div>
<div><br></div><div>Do you think we can trust the polarization value obtained with mBJ?</div><div><br></div><div><br></div><div>Thank you in advance</div><div>Oleg</div></div>