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Dear zeila,

Thank you for the reply, and I also noticed this paper, which is a very good 
one.PhysRevB vol 75 (2007) 245121 "Model GW band structure of InAs and GaAs 
in the wurtzite phase"

In my calculation, I use 3 electrons as valence without 4d electrons. As you 
said, I will try 13 valence electron which is really timeconsuming. 

To find the LDA gap in my calculation, I check it from the following 
information, Is that the right way to find it?
##################
Perturbative Calculation

 k =    0.000   0.000   0.000
 Band     E0 <VxcLDA>   SigX SigC(E0)      Z dSigC/dE  Sig(E)    E-E0       E
    4  -0.452 -10.890 -11.914   0.900   0.800  -0.249 -10.989  -0.099  -0.551
    5  -0.452 -10.890 -10.499  -0.507   0.798  -0.253 -10.983  -0.093  -0.545

 E^0_gap          0.000
 E^GW_gap         0.006
 DeltaE^GW_gap    0.006

############
Best wishes,

Weichao Wang