[Pw_forum] Ferromagnetic Insulator is the Ground State

[Andrea Dal Corso]

On Wed, 2011-01-19 at 12:09 +0100, S. K. S. wrote:
> >   Dear Prof. Andrea Dal Corso,
> >
> >   Thanks a lot for your helpful reply.
> >
> >   I have further question, what one should do if the ground state is
> >   Ferromagnetic  (FM) INSULATOR ? Is there any way ?
> >
> If the AFM state can be stabilized by symmetry, starting with opposite
> starting magnetizations, then the phonon code should work. If you need
> a
> constraint to stabilize the AFM ground state, then presently you
> cannot
> do a phonon calculation.
> 
> HTH,
> 
> Dear Professor,
>  
> Thanks a lot for your kind reply. I am still a bit confused.
> Is this your above reply implying that even if I get ferromagnetic 
> insulator as ground-state, then also I need to follow the above method
> (which is 
> for ANTI-FERROMAGNETIC insulator) to estimate the Born-effective
> charges ?
> 

I never tried to use the phonon code in this case. Probably if you try
you will find some bug in the code, but it could be an interesting test.
Please let me know the result, or provide the example if it does not
work. 

Andrea



> Thanking you and with my best regards,
> Saha SK
> JNCASR
> Bangalore 560012
> 
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-- 
Andrea Dal Corso                    Tel. 0039-040-3787428
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