<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Dear Prof. Blaha,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I formed Slab structures for Ta and HgTe (attached .struct files) and ran WIEN2k 21 version. From the output (.scf files), I find that the work function for Ta and HgTe are similar. However, I am interested to know their difference of Fermi energies. I cannot determine the zero energy of the calculation in the two cases. I shall think that the Fermi energy of Ta (a metal) would be significantly higher than that of HgTe ( an insulator). </div><div dir="ltr" data-setdir="false">Could you kindly help me in determining the difference of Fermi energies of Ta and HgTe? </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">With best regards</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Amlan Ray</div><div dir="ltr" data-setdir="false">Variable Energy Cyclotron Center</div><div dir="ltr" data-setdir="false">Kolkata, India</div></div></body></html>