<div dir="auto"><div>..not the decomposition by band and kpoint...</div><div><br></div><div data-smartmail="gmail_signature">---<br>Emeritus Professor Laurence Marks (Laurie)<br><a href="http://www.numis.northwestern.edu">www.numis.northwestern.edu</a><br><a href="https://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en">https://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en</a><br>"Research is to see what everybody else has seen, and to think what nobody else has thought" Albert Szent-Györgyi</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Apr 8, 2026, 17:05 Laurence Marks <<a href="mailto:laurence.marks@gmail.com">laurence.marks@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:arial,sans-serif;font-size:small;color:#000000">It gives them for each band. The conventional definition of electron & hole effective masses are at the VB and CB edges, which is what I want, not the decomposition by band.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 8, 2026 at 4:52 PM Rubel, Oleg <<a href="mailto:rubelo@mcmaster.ca" target="_blank" rel="noreferrer">rubelo@mcmaster.ca</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">mstar computes the six components of the 1/m_ij tensor, as well as the principal components of the 1/m tensor.<br>
For the conductivity, please check PY-BerryAHC (<a href="https://arxiv.org/abs/2504.00123v2" rel="noreferrer noreferrer" target="_blank">https://arxiv.org/abs/2504.00123v2</a>). My understanding is that they implemented the Kubo formula for electrical conductivity.<br>
<br>
Oleg<br>
<br>
> -----Original Message-----<br>
> From: Wien <<a href="mailto:wien-bounces@zeus.theochem.tuwien.ac.at" target="_blank" rel="noreferrer">wien-bounces@zeus.theochem.tuwien.ac.at</a>> On Behalf Of<br>
> Laurence Marks<br>
> Sent: Wednesday, April 8, 2026 5:32 PM<br>
> To: A Mailing list for WIEN2k users <<a href="mailto:wien@zeus.theochem.tuwien.ac.at" target="_blank" rel="noreferrer">wien@zeus.theochem.tuwien.ac.at</a>><br>
> Subject: [Wien] Effective mass<br>
> <br>
> Caution: External email.<br>
> Is there a simple way of calculating the conventional effective mass tensor?<br>
> Unfortunately it seems that mstar does a decomposition but does not in fact<br>
> calculate the standard conduction/valence values, one would have to do a fair<br>
> amount of post-processing to identify the relevant range of k-values and<br>
> energies.<br>
> <br>
> --<br>
> <br>
> Emeritus Professor Laurence Marks (Laurie) Northwestern University<br>
> <br>
> Webpage <<a href="http://www.numis.northwestern.edu" rel="noreferrer noreferrer" target="_blank">http://www.numis.northwestern.edu</a>> and Google Scholar link<br>
> <<a href="http://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en" rel="noreferrer noreferrer" target="_blank">http://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en</a>><br>
> "Research is to see what everybody else has seen, and to think what nobody<br>
> else has thought", Albert Szent-Györgyi<br>
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Emeritus Professor Laurence Marks (Laurie)<div>Northwestern University<br><div><a href="http://www.numis.northwestern.edu" target="_blank" rel="noreferrer">Webpage</a> and <a href="http://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en" target="_blank" rel="noreferrer">Google Scholar link</a></div><div>"Research is to see what everybody else has seen, and to think what nobody else has thought", Albert Szent-Györgyi</div></div></div></div>
</blockquote></div>