[Pw_forum] problem of Bi2Se3 with spin orbit coupling parity analysis at TRIM points

[Andrea Dal Corso]

I meant that in the NOSOC case the valence bands go from 11 to 24
(14 bands) and 6 have parity g while 8 have parity u.

In the SOC case the same valence bands goes from 21 to 48
and 14 are + and 14 are - meaning that 7 couples of degenerate bands  
are +  and 7 couples are -.

HTH,

Andrea



Quoting balabi <balabi at qq.com>:

> Dear Andrea,
>      Thank you very much for explanation. 
>      But I don't get it. What do you mean by 6g and 8u? Which lines do
> 6g and 8u ( also 7+ 7-)correspond to?
>      And I can not see why your argument can lead to different parity
> product for nosoc and  soc case.
>      I still don't know why my counting is wrong.
>
> best regards
>     
>