Are you sure that you only want to simulate 10 spins? How do you define a phase transition for 10 spins? Don't you want to simulate a lattice? In a lattice you should give the unit cell. Do you have a simple cubic, fcc or bcc lattice? How many spins per unit cell?


Matthias

On 25 Nov 2009, at 02:21, Muhammad Rofiq wrote:


I used the Heisenberg model for S = 1/2 such as done on experiment, but I still having difficulty to make couling of lattice cubic, my lattice stucture is like in enclosure file



--- Pada Sel, 24/11/09, comp-phys-alps-users-request@phys.ethz.ch <comp-phys-alps-users-request@phys.ethz.ch> menulis:

Dari: comp-phys-alps-users-request@phys.ethz.ch <comp-phys-alps-users-request@phys.ethz.ch>
Judul: Comp-phys-alps-users Digest, Vol 44, Issue 8
Kepada: comp-phys-alps-users@phys.ethz.ch
Tanggal: Selasa, 24 November, 2009, 6:00 PM

Send Comp-phys-alps-users mailing list submissions to
    comp-phys-alps-users@phys.ethz.ch

To subscribe or unsubscribe via the World Wide Web, visit
    https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
or, via email, send a message with subject or body 'help' to
    comp-phys-alps-users-request@phys.ethz.ch

You can reach the person managing the list at
    comp-phys-alps-users-owner@phys.ethz.ch




Message: 3
Date: Tue, 24 Nov 2009 08:44:53 +0800 (SGT)
From: Muhammad Rofiq <roq_4q@yahoo.co.id>
Subject: [ALPS-users] lattice....
To: comp-phys-alps-users@phys.ethz.ch
Message-ID: <550593.22765.qm@web76516.mail.sg1.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"

Dear all,,


When I simulate the susceptibility of Cd0.3Mn0.7Te, I had a problem of my results. The result has obtained not to synchronize with theory. I get 5K of Neel Temperature, while the theory is 23 of Neel Temperature. is there's any mistake with my cubic lattice?

my cubic lattice is :





<LATTICES>


<GRAPH
name="latiskubik">

?<VERTEX id="1"
type="0"/> <VERTEX id="2"
type="0"/><VERTEX id="3" type="1"/>

?<VERTEX id="4"
type="0"/><VERTEX id="5" type="0"/>
<VERTEX id="6" type="0"/>

?<VERTEX id="7"
type="0"/> <VERTEX id="8" type="1"/>
<VERTEX id="9" type="0"/>

?<VERTEX id="10"
type="0"/>

?<EDGE type="0"
source="1" target="2"/><EDGE type="1"
source="2" target="3"/>

?<EDGE type="0"
source="4" target="1"/><EDGE type="1"
source="3" target="4"/>

?<EDGE type="0"
source="5" target="4"/><EDGE type="1"
source="6" target="3"/>

?<EDGE type="0"
source="5" target="6"/><EDGE type="1"
source="7" target="8"/>

?<EDGE type="0"
source="6" target="7"/><EDGE type="1"
source="8" target="5"/>

?<EDGE type="0"
source="9" target="10"/><EDGE type="1"
source="8" target="9"/>

?<EDGE type="0"
source="10" target="7"/>

</GRAPH>


</LATTICES>



Thanks before,,



      Buat sendiri desain eksklusif Messenger Pingbox Anda sekarang! Membuat tempat chat pribadi di blog Anda sekarang sangatlah mudah. http://id.messenger.yahoo.com/pingbox/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://webmail.phys.ethz.ch/pipermail/comp-phys-alps-users/attachments/20091124/0387f692/attachment-0001.htm

------------------------------

Message: 4
Date: Tue, 24 Nov 2009 07:01:50 +0100
From: Matthias Troyer <troyer@phys.ethz.ch>
Subject: Re: [ALPS-users] lattice....
To: comp-phys-alps-users@phys.ethz.ch
Message-ID: <DF9B105E-4A7C-4A93-A307-4CE9D2FC7FFA@phys.ethz.ch>
Content-Type: text/plain; charset="us-ascii"

Hi,

If the theory does not agree with experiment you might have used an inappropriate model. How did you obtain all your coupling constants?

Matthias

On Nov 24, 2009, at 1:44 AM, Muhammad Rofiq wrote:

> Dear all,,
>
>
> When I simulate the susceptibility of Cd0.3Mn0.7Te, I had a problem of my results. The result has obtained not to synchronize with theory. I get 5K of Neel Temperature, while the theory is 23 of Neel Temperature. is there's any mistake with my cubic lattice?
>
> my cubic lattice is :
>
> <LATTICES>
> <GRAPH name="latiskubik">
>  <VERTEX id="1" type="0"/> <VERTEX id="2" type="0"/><VERTEX id="3" type="1"/>
>  <VERTEX id="4" type="0"/><VERTEX id="5" type="0"/> <VERTEX id="6" type="0"/>
>  <VERTEX id="7" type="0"/> <VERTEX id="8" type="1"/> <VERTEX id="9" type="0"/>
>  <VERTEX id="10" type="0"/>
>  <EDGE type="0" source="1" target="2"/><EDGE type="1" source="2" target="3"/>
>  <EDGE type="0" source="4" target="1"/><EDGE type="1" source="3" target="4"/>
>  <EDGE type="0" source="5" target="4"/><EDGE type="1" source="6" target="3"/>
>  <EDGE type="0" source="5" target="6"/><EDGE type="1" source="7" target="8"/>
>  <EDGE type="0" source="6" target="7"/><EDGE type="1" source="8" target="5"/>
>  <EDGE type="0" source="9" target="10"/><EDGE type="1" source="8" target="9"/>
>  <EDGE type="0" source="10" target="7"/>
> </GRAPH>
> </LATTICES>
>
>
> Thanks before,,
>
> Lebih aman saat online.
> Upgrade ke Internet Explorer 8 baru dan lebih cepat yang dioptimalkan untuk Yahoo! agar Anda merasa lebih aman. Gratis. Dapatkan IE8 di sini!

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://webmail.phys.ethz.ch/pipermail/comp-phys-alps-users/attachments/20091124/a8a4416f/attachment-0001.htm

End of Comp-phys-alps-users Digest, Vol 44, Issue 8
***************************************************

Lebih aman saat online.
Upgrade ke Internet Explorer 8 baru dan lebih cepat yang dioptimalkan untuk Yahoo! agar Anda merasa lebih aman. Gratis. Dapatkan IE8 di sini!<kisi kristal Mn doped.jpg>