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<p class="p1">Dear Elie Moujaes </p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p1">Do you mean that your calculated Fermi-energy in C60 system is not located at which the DOS becomes zero even though you got the reasonable band structure. </p>
<p class="p2"><br></p>
<p class="p1">If so, I recommend a check for the convergence of Fermi-energy.</p><p class="p1"> </p>
<p class="p1">For example, </p>
<p class="p2"><br></p>
<p class="p1">please check the energy convergence against </p>
<p class="p2"><br></p>
<p class="p1">(1) increase of the number of k-points in nscf calculation, after you confirm that the KS energy spectrum is converged sufficiently in SCF calculation (and also should check the convergence against the smearing width)</p>
<p class="p2"><br></p>
<p class="p1">(2) change in the mesh in DOS calculation.</p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p1">May be you will get more reliable and better result. </p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p1">Hope this helps. </p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p1">Best Regards.</p>
<p class="p1">Haruhiko Dekura</p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p3">========================================</p>
<p class="p4"><br></p>
<p class="p3">Haruhiko Dekura</p>
<p class="p4"><br></p>
<p class="p3">Postdoctoral Fellow</p>
<p class="p4"><br></p>
<p class="p3">Senior Research Fellow Center, Ehime University, 2?5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan</p>
<p class="p3">=====================================</p></div><div><br></div><br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear all,<br>
<br>
I am trying to get the band structure and the DOS of a Grain boundary system of 60 atoms.<br>
<br>
(1) The band structure seems ok but when I am trying to set the Fermi energy to be the reference (i.e at 0) where two bands cross, it is not working i.e. I am still getting that the two bands still cross at a negative value (my Fermi energy is -0.098eV). Why is this happening?<br>
<br>
(2) The DOS of the system is not zero at zero energy (maybe this is a consequence of 1) and it is a bit wiggly as well (see graph attached)<br>
<br>
<br>
Thanks in advance<br>
<br>
Regards<br>
<br>
Elie Moujaes<br>
University of Nottingham<br>
NG7 2RD<br>
UK<br></blockquote></div>