[Wien] help required

[Peter Blaha]

No, this matrix is NOT always the identity + a translation.

If you are not familiar with symmetry (eg. cannot understand which 
symmetry operations would transform in Si the two atoms into each 
other), than just forget the AFM option and just run it as 
spin-polarized case.
Just meke sure that you flip the spins properly in case.inst and then 
after a spin-polarized init use runsp.

Am 08.02.2012 12:48, schrieb arqum hashmi:
> Thanks A lot Sir,
> it means if i only give translation from one spin up atom to another
> spin dn atom in 4th column. it will be fine.
> am i correct or not?????????? or is there any other method in wien2k to
> calculate AFM configuration.
> Thanks and Regards
> Arqum Hashmi
>
> ------------------------------------------------------------------------
> *From:* Tomas Kana <kana at seznam.cz>
> *To:* A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at>
> *Sent:* Wednesday, February 8, 2012 3:08 AM
> *Subject:* Re: [Wien] help required
>
> Dear Arqum Hashmi,
> In my opinion, the rotation is usually identity which means a unity matirx
> and you manily need to determine the translation vector that shifts the
> spin-up atoms
> to spin-down atoms. Like in BCC Chromium:
> 1 0 0 0.5
> 0 1 0 0.5
> 0 0 1 0.5
>
> Regards
> Tomas K.
>
> ------------ Původní zpráva ------------
> Od: arqum hashmi <arqumhashmi at yahoo.com <mailto:arqumhashmi at yahoo.com>>
> Předmět: Re: [Wien] help required
> Datum: 08.2.2012 11:07:24
> ----------------------------------------
> Thanks Sir,
> but i am asking about that matrices which appears in AFM calculation. how i
> define that matrices symmetry operation (rotation + translation vector)
> which
> converts spin up into dn????????????????
> what is the method to find the proper symetry operation matrices for any
> case?
> thanks and regards
> Arqum Hashmi
>
>
> ________________________________
> From: Ghosh SUDDHASATTWA <ssghosh at igcar.gov.in
> <mailto:ssghosh at igcar.gov.in>>
> To: 'A Mailing list for WIEN2k users' <wien at zeus.theochem.tuwien.ac.at
> <mailto:wien at zeus.theochem.tuwien.ac.at>>
> Sent: Wednesday, February 8, 2012 6:44 PM
> Subject: Re: [Wien] help required
>
>
>
> Change the equivalent atoms to inequivalent by changing it
> as Cr1 and Cr2 in the supercell struct file. Copy the supercell struct file
> into the struct file. Then define the spins of atoms in instgen_lapw.
>
> Cheers
>
>
>
> ________________________________
>
> From:wien-bounces at zeus.theochem.tuwien.ac.at
> <mailto:wien-bounces at zeus.theochem.tuwien.ac.at>
> [mailto:wien-bounces at zeus.theochem.tuwien.ac.at
> <mailto:wien-bounces at zeus.theochem.tuwien.ac.at>] On Behalf Of arqum hashmi
> Sent: Wednesday, February 08, 2012
> 12:16 PM
> To: A Mailing list for WIEN2k users
> Subject: [ Wien ]
> help required
>
> Dear users
> i am new user of wien2k.i want to calculate AFM calculation.i read already
> about BCC Cr but that is very simple case. But i dn't know how to find the
> proper symetry operation matrices for any case?
> My structure
> is Rohmbohedral and when i made supercell now it is hexagonal then now
> how can
> i give proper symmetry operation which converts spin up into dn????
> Please guide me about this or tell me about any literature which explains
> symmetry
> operation (rotation + translation vector) which transforms the spin-up
> into the
> spin-dn atom.
> i will be
> very thankful to you.
> Best Regards
> Arqum
> Hashmi
>
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-- 
Peter Blaha
Inst.Materials Chemistry
TU Vienna
Getreidemarkt 9
A-1060 Vienna
Austria
+43-1-5880115671