[Pw_forum] for help inGaAs

[顾辰杰]

Dear pwscf users,
i want to calculate the spin Hall Effect in hole doped GaAs.
however,we do not know how to set atomic positions.
for example,in the GaAs system scf calculation ,
I set the atomic position as follows:
Ga 0 0 0
As 0.25 0.25 0.25
but how can I do if I want to add two vacant( 0.5 0.5 0.5) (0.75 ,0.75 0.75) in the GaAs scf calculation?

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