Since the spin of the system changes like a spiral. The magnetic moment is non-collinear. The quantization axis changes. So it is necessary to do a non-collinear calculation.<div><br></div><div>Yundi<br><br><div class="gmail_quote">
On Fri, Sep 30, 2011 at 1:24 PM, Ruben Weht <span dir="ltr"><<a href="mailto:ruweht@cnea.gov.ar">ruweht@cnea.gov.ar</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear Wien users,<br>
<br>
I am trying to reproduce some papers regarding the<br>
electronic structure of topological insulators<br>
and system with an important Rashba interaction<br>
(for instance BiTeI, Bi2Se3, etc).<br>
<br>
On many of them people calculate the electronic band<br>
structure (on a slab for a topological insulator<br>
or in bulk for a Rashba system) and showed what<br>
is called "spin texture", a non-collinear spin<br>
arrangement along the resulting Fermi surface<br>
(most of the time near a Dirac cone).<br>
Almost all of those papers said that the electronic<br>
structure was calculated using Wien2k.<br>
<br>
In general those system have a very strong<br>
spin-orbit coupling so, naively, I thought that<br>
spins up and down were completely mixed.<br>
<br>
Does anyone know how to calculate/plot that<br>
property?<br>
Do I have to use the non-collinear code, Wienncm?.<br>
<br>
Thanks a lot for your help,<br>
<br>
Ruben<br>
<br>
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</blockquote></div><br></div>