Dear Lorenzo,<div><br></div><div>You are right. My inversion region looks too thick. I will redo the calculations using larger (smaller) emaxpos (eopreg). Hope this will solve the problem.</div><div><br></div><div>Thanks,</div>
<div>Soroush</div><div><div><br><div class="gmail_quote">On Fri, Dec 17, 2010 at 5:21 AM, Lorenzo Paulatto <span dir="ltr"><<a href="mailto:lorenzo.paulatto@impmc.upmc.fr">lorenzo.paulatto@impmc.upmc.fr</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">In data 16 dicembre 2010 alle ore 19:33:41, soroush pakseresht<br>
<<a href="mailto:spakinform@gmail.com">spakinform@gmail.com</a>> ha scritto:<br>
> slightly above<br>
> just below<br>
<br>
Dear Soroush,<br>
"safely far" is a wiser distance quantifier than "slightly" and "just"<br>
when using sawtooth potential. Ideally there should be absolutely *zero*<br>
charge density in the inversion region (from emaxpos to eopreg). This is<br>
easier to achieve if you use a small inversion region (eopreg ~ 0.05) and<br>
a lot of vacuum in the slab geometry. Keep in mind that the charge density<br>
of an atom can still be important far behyond its conventional covalent or<br>
ionic radius (I would say >5 bohr).<br>
<br>
best regards<br>
<br>
<br>
<br>
--<br>
Lorenzo Paulatto<br>
post-doc @ IMPMC/UPMC - Université Paris 6<br>
phone: +33 (0)1 44 27 74 89<br>
www: <a href="http://www-int.impmc.upmc.fr/~paulatto/" target="_blank">http://www-int.impmc.upmc.fr/~paulatto/</a><br>
<br>
previously (take note of the change!):<br>
phd student @ SISSA & DEMOCRITOS (Trieste)<br>
phone: +39 040 3787 511<br>
www: <a href="http://people.sissa.it/~paulatto/" target="_blank">http://people.sissa.it/~paulatto/</a><br>
<div><div></div><div class="h5">_______________________________________________<br>
Pw_forum mailing list<br>
<a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
<a href="http://www.democritos.it/mailman/listinfo/pw_forum" target="_blank">http://www.democritos.it/mailman/listinfo/pw_forum</a><br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Soroush Pakseresht<div>Advanced Science Institute (RIKEN)</div><div>Saitama-Japan</div><br>
</div></div>