<div dir="ltr"><div>Dear Giuseppe<br><br></div>Thank you so much for your kind reply.<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jun 17, 2013 at 2:14 PM, Giuseppe Mattioli <span dir="ltr"><<a href="mailto:giuseppe.mattioli@ism.cnr.it" target="_blank">giuseppe.mattioli@ism.cnr.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Dear Khadije Khalili<br>
A non-periodic object is not, in principle, characterised by dispersed electronic states in the reciprocal space. Dispersion arises sometimes if your<br>
molecule interacts strongly with its periodically repeated images, but it has to be considered as a spurious effect of a too small supercell. So put<br>
your molecule in a satisfactorily large cell and use Gamma only to sample the Brillouin zone.<br>
<br>
HTH<br>
<br>
Giuseppe<br>
<div class="im"><br>
<br>
On Sunday 16 June 2013 18:20:51 raha khalili wrote:<br>
> Dear Users<br>
><br>
> I want to relax a molecule in X-Y plane. What is the best k-point for my<br>
> caculation? What the diference between 2 2 1 1 1 0 and 2 2 1 1 1 1?<br>
><br>
> Best Wishes<br>
<br>
<br>
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<span class="HOEnZb"><font color="#888888"><br>
Giuseppe Mattioli<br>
CNR - ISTITUTO DI STRUTTURA DELLA MATERIA<br>
v. Salaria Km 29,300 - C.P. 10<br>
I 00015 - Monterotondo Stazione (RM)<br>
Tel + 39 06 90672836 - Fax +39 06 90672316<br>
E-mail: <<a href="mailto:giuseppe.mattioli@ism.cnr.it">giuseppe.mattioli@ism.cnr.it</a>><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div>Khadije Khalili</div><div>PhD Student of Solid-State Physics</div>Nanothechnology Group, University of Mazandaran, Babolsar, Iran</div></div>