How to calculate charged defect using vasp?

08 August 2018 0 5K Report

I am trying to calculate the defect formation energy of ABX3 type perovskite. I don't understand how to calculate the charged defect formation energy.Suppose, I am creating a vacancy A by removing one A atom. will that be a neutral defect or charged? Also, how can I get the graph attached below. (See formation energy.png)

Please give me an elaborate explanation.

Thanks

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