[Pw_forum] character-wise

[Andrea Dal Corso]

On Fri, 2015-01-30 at 16:06 +0100, Suza W wrote:
> Hi All,
> 
> Could any of you please confirm me how the colors are chosen in the
> attached figure?
> I mean, what is the real meaning (orbital ? ) of the same color, suppose,
> "blue" ?

Different colors means different representations of the small group of
k.
Different lines have different point groups so coincidence of colors on
different lines has no meaning, but bands with the same color on the
same line (for instance along delta) belong to the same representation.
So for instance along delta all the red bands belong to the delta_1
representation that means that the wavefunctions are totally symmetric,
all the blue bands belong to delta_5 so are two-fold degenerate ecc. 

HTH,

Andrea

> Delta_5 and Sigma_4 imply two different character of the bands, but still
> the same "blue" color for both has been used.
> If colors are not chosen character-wise, then based on which parameter the
> colors are chosen here?
> 
> Thanks in advance,
> 
>    Suza W.
>    Department of Physics,
>    Kakatiya University.
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Andrea Dal Corso                    Tel. 0039-040-3787428
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