you should use irrep,
see  the manual for details and restrictions


DEEP THOUGHT in D. Adams; Hitchhikers Guide to the Galaxy:
"I think the problem, to be quite honest with you,
is that you have never actually known what the question is."

Dr. Gerhard H. Fecher
Institut of Inorganic and Analytical Chemistry
Johannes Gutenberg - University
55099 Mainz
Max Planck Institute for Chemical Physics of Solids
01187 Dresden
Von: Wien [] im Auftrag von Little Grass 
Gesendet: Montag, 3. Oktober 2016 05:44
Betreff: [Wien] fix fake avoided crossing

Dear WIEN2k users,

When calculate band structure, I find that the bands form fake avoided 
crossings. How can I fix those fake avoided crossings?

For example, Fig 1 shows the calculated band structure for MgO from X to Gamma 
to X. The plot are made from the data in (or case.spaghetti_ene). 
We can see there are several places where the bands cross each other. For 
example band 9 and 10 cross at around 12 eV, band 11 and 15 cross at around 24 
eV. But these are not true avoid crossings, they are just the mixing of the 
labeling of the bands. I would like to fix these fake avoided crossings, so 
that the bands are truely cross each other. A desired result is in Fig 2. So my 
question is how can fix these avoided crossings?

I want to fix these avoided crossings because I want to study the dipole 
transition element between two bands as a function of k. These avoided 
crossings lead to sudent jumps in the dipole transient elements.

Fig 1:

Fig 2:

Thanks in advance for your help.



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