[Wien] Slater TELNES/XAS method (or core hole) for magnetic atom

Peter Blaha pblaha at theochem.tuwien.ac.at
Wed Jul 31 07:38:58 CEST 2019


If you excite a spin-up core electron it should in principle go into a 
spin-up conduction band state (on that atom AND into an l+-1 state).

These conditions can never be fulfilled in general. If you are lucky, 
the electron goes into the correct state (AND SHOULD CHANGE THE SPIN 
STATE !!), if not the electron (eg. for O-K spectra goes into a TM-d 
state) goes somewhere else. This is the reason why the instructions say: 
"either increase NE in case.in2 or put a background charge in case.inm".

Core-hole calculations are an approximation .....

Am 31.07.2019 um 03:31 schrieb Laurence Marks:
> Maybe I am missing something.
> 
> To do TELNES/XAS with a core hole (or a Slater 1/2 hole) for a magnetic 
> atom, I believe one has to use runfsm to ensure that the spin state does 
> not change as that would be GIGO. I don't see this in the documentation, 
> and in fact the w2web TELNES won't do this right.
> 
> -- 
> Professor Laurence Marks
> Department of Materials Science and Engineering
> Northwestern University
> www.numis.northwestern.edu <http://www.numis.northwestern.edu/>
> Corrosion in 4D: www.numis.northwestern.edu/MURI 
> <http://www.numis.northwestern.edu/MURI>
> Co-Editor, Acta Cryst A
> "Research is to see what everybody else has seen, and to think what 
> nobody else has thought"
> Albert Szent-Gyorgi
> 
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