I used 5.2.0(Revision 22561 Hash (prev commit) 785b4fd6f) to obtain the abs and sorted the exciton, and I found the output of >ypp -e s have negative energies, and the absorption is also wired where the low energy absorption peak is very high. I noticed in 5.2.0 the option
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Lkind= "BAR" # [BSE,X] bar(default)/full
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Lkind= "Lbar" # [BSE] Lbar (default) / full
I never met this wired behavior in the previous version. I do not know if the problem is here.
(attached are the alpha and exciton sorted files, and I just loaded part of the E_sorted file due to the limited size)
Thanks!
Shudong