[Pw_forum] How to change the weight parameter in hybrid functional?

[杨茂]

Hi, everyone
The "PBE hybrid functional" is given as: 
Exc(PBE)=a*Ex(HF)+(1-a)*Ex(PBE)+Ec(PBE). There is a weight parameter "a" in the range (0,1), and PBE0 is for a=0.25. How can I change the parameter "a" in the input file of PWSCF code?
"Phys. Rev. Lett. 101, 106802 (2008)" and "Phys. Rev. Lett. 101, 046405 (2008)"
have changed parameter "a" in order to make the bandgap value of some semiconductors agreed with experiment.
thanks
myang
     
Tel:＋86-010-6275-7594
Email: vcuteym at 126.com
School of Physics
Peking University
Beijing, 100871
China
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.quantum-espresso.org/pipermail/users/attachments/20081211/58cd7154/attachment.html>