You can use qmc/looper instead of qmc/dirloop_sse. It will calculate "Generalized Magnetization^2", which is exactly S(pi,pi,pi) (multiplied by N), if your interactiions are all antiferromagnetic.

Best, Synge

From: Jean-David Picon jean-david.picon@epfl.ch Date: Thu, 19 Apr 2007 10:26:15 +0200

Hi,

I am still in trouble with my unitcell and lattice. My unitcell is defined as follows

<UNITCELL name="dimerZ" dimension="3"> <VERTEX type="1"> <COORDINATE> 0 0 0</COORDINATE> </VERTEX> <VERTEX type="2"> <COORDINATE> 0 0 1 </COORDINATE> </VERTEX> <EDGE type="0"><SOURCE vertex="1" offset="0 0 0"/><TARGET vertex="2" offset="0 0 0"/></EDGE>

<EDGE type="1"><SOURCE vertex="1" offset="0 0 0"/><TARGET vertex="1" offset="1 0 0"/></EDGE> <EDGE type="2"><SOURCE vertex="2" offset="0 0 0"/><TARGET vertex="2" offset="1 0 0"/></EDGE>

<EDGE type="1"><SOURCE vertex="1" offset="0 0 0"/><TARGET vertex="1" offset="0 1 0"/></EDGE> <EDGE type="2"><SOURCE vertex="2" offset="0 0 0"/><TARGET vertex="2" offset="0 1 0"/></EDGE>

</UNITCELL>

and describes 2 spins oriented ALONG THE Z axe. In order to have one layer of these pairs AND structure factor results in 3D with sse, I choose a 3D cubic lattice of height 1. (If I choose a 2D cubic lattice, I just get e.g. (pi, pi) structure factor and not (pi,pi,X)).

The problem : the structure factor results are only (X,X,0) results. I do not have for example (pi,pi,pi) SF whereas my system is really 3D.

Any help to understand why is welcome ! Thanks,

Jean-David