Dear Tone<br><br>Thanks you so much for the answer.<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">
<br>
</div><div class="im">> edir = 3<br>
> emaxpos = 0.9<br>
> eopreg = 0.2<br>
> eamp = 0.019447<br>
> /<br>
<br>
</div>This input explains why you face SCF problems: they are inevitable with<br>
your dipole-layer specification. You have placed your dipole layer<br>
from 0.9 to 0.9+0.2=1.1. Note that position of emaxpos/eopreg is in<br>
internal units, in range [0,1].<br></blockquote><div><br>Now I'm a little bit confused, because i use a previous thread about that<br><br><a href="http://www.democritos.it/pipermail/pw_forum/2009-December/015430.html">http://www.democritos.it/pipermail/pw_forum/2009-December/015430.html</a><br>
<br>What I have to do?<br><br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
>From you other email I assume your z-lattice vector is 140 bohr long,<br>
and your Al slab extends from z=0 to z=82 bohr. Based on this data, a<br>
good choice of emaxpos & eopreg would be:<br>
<br></blockquote><div>Sorry, I have now a slab put in the middle of the cell in the Z axis, from z=32 to z=50 (maximum). <br><br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
An important thing when applying strong electric fields (which is your<br>
case) is to check against the electron field emission (i.e. that a<br>
fraction of electrons doesn't spill to a dipole layer). This can be<br>
verified by inspecting a charge density in the vacuum region (or even<br>
better a charge density difference between a slab under electric field<br>
and no field).<br></blockquote><div><br>Really thanks, I will check this when I obtain some results, using E-Field. <br></div></div><br>Regards<br>Joaquin Peralta<br><br clear="all"><br>-- <br>----------------------------------------------------<br>
Group of NanoMaterials<br>----------------------------------------------------<br><a href="http://www.gnm.cl" target="_blank">http://www.gnm.cl</a><br>----------------------------------------------------<br>Joaquín Andrés Peralta Camposano<br>
----------------------------------------------------<br><a href="http://www.lpmd.cl/jperalta" target="_blank">http://www.lpmd.cl/jperalta</a><br><br>In a world without frontiers, <br>who needs Gates and Win.<br>