Closed Sourin-chatterjee closed 2 years ago
Hi, Thanks for pointing this out. In principle, the Fisher lattice should work -- I'll take a look!
There was a small issue in the code which could trigger the exception for lattices that contain multiple lattice bonds of different length (as is the case for your unit cell definition of the Fisher lattice). I just pushed a patch #8 for the issue and successfully tested your lattice definition in combination with a nearest neighbor Heisenberg model (see below for the model definition.)
<unitcell name="fisher">
<primitive x="1" y="0" z="0" />
<primitive x="0" y="1" z="0" />
<primitive x="0" y="0" z="1" />
<site x="-1/3" y="0" z="0" />
<site x="0" y="-1/3" z="0" />
<site x="1/3" y="0" z="0" />
<site x="0" y="1/3" z="0" />
<bond from="0" to="1" da0="0" da1="0" da2="0" />
<bond from="1" to="2" da0="0" da1="0" da2="0" />
<bond from="2" to="3" da0="0" da1="0" da2="0" />
<bond from="3" to="0" da0="0" da1="0" da2="0" />
<bond from="2" to="0" da0="1" da1="0" da2="0" />
<bond from="3" to="1" da0="0" da1="1" da2="0" />
</unitcell>
<model name="fisher-heisenberg">
<!-- Heisenberg model on the Fisher lattice -->
<interaction parameter="j" from="0,0,0,0" to="0,0,0,1" type="heisenberg" />
<interaction parameter="j" from="0,0,0,1" to="0,0,0,2" type="heisenberg" />
<interaction parameter="j" from="0,0,0,2" to="0,0,0,3" type="heisenberg" />
<interaction parameter="j" from="0,0,0,3" to="0,0,0,0" type="heisenberg" />
<interaction parameter="j" from="0,0,0,2" to="1,0,0,0" type="heisenberg" />
<interaction parameter="j" from="0,0,0,3" to="0,1,0,1" type="heisenberg" />
</model>
Thanks, Finn. It's working fine now .
I am trying to implement fisher lattice using Spinparser.(https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.224404) Lattice definition that i used: [unitcell name="fisher"] [primitive x="1" y="0" z="0" /] [primitive x="0" y="1" z="0" /] [primitive x="0" y="0" z="1" /]
[/unitcell]
The unit cell that i am taking is:
The error message is: