Dear Jonathan,<br><br>thank you for the reply.<br><br>I think i have still some troubles to understand how to give a good starting guess. :-)<br><br>Please let look at this paper:<br><br>J. Phys. Soc. Jpn. <a href="http://jpsj.ipap.jp/archive/JPSJ-78.html"><b>78</b></a> (2009) 113704 <br>
<br>and let think we want to reproduce exactly the WFs in their Fig. 3.<br><br>As you can see the Wannier functions are localized over all the molecule and they look like some linear combination of p states over all the C and H ions.<br>
<br>Is the option " f=0,0.50,0:pz" a good starting guess?<br>Is the latter option the best i can use in such case?<br><br>ciao<br><br>G.<br><br><br><div class="gmail_quote">On Wed, Apr 14, 2010 at 11:00 AM, Jonathan Yates <span dir="ltr"><<a href="mailto:jonathan.yates@materials.ox.ac.uk">jonathan.yates@materials.ox.ac.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im"><br>
On 14 Apr 2010, at 07:29, Gianluca Giovannetti wrote:<br>
<br>
> Dear Jonathan,<br>
><br>
> thank you for your reply.<br>
><br>
> I think the symmetry of the WFs should be of p character.<br>
><br>
> I have however one problem.<br>
> I have 4 bands.<br>
> The number of Carbon ions in one molecule is 22 (and there are 2 molecules).<br>
><br>
> How can i set the flags:<br>
><br>
> begin projections<br>
><br>
> end projections<br>
><br>
> in such case in order to avoid the code messagge: "param_get_projection: too many projections defined"?<br>
<br>
</div>Gianluca,<br>
<br>
The short cut notion<br>
C:pz<br>
would put a single p orbital on all C sites - so would lead to the error you describe.<br>
<br>
To specify a p_z orbital on a single site you can use fraction or cartesian coordinates<br>
eg f=0,0.50,0:pz<br>
Alternatively if you give the atoms on which you want to have projections a different name in the atom list eg 'C1' then you can just do C1:pz (see example10 - and Chapter 3 of the user guide)<br>
<br>
Yours<br>
<div><div></div><div class="h5"> Jonathan<br>
<br>
<br>
<br>
<br>
--<br>
Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, UK<br>
tel: +44 (0)1865 612797 <a href="http://users.ox.ac.uk/%7Eoums0549/" target="_blank">http://users.ox.ac.uk/~oums0549/</a><br>
<br>
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