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[Ms Gargi Dutta <gdutta@jncasr.ac.in>]

  Hi,
     i am an Abinit user. I am doing a surface calculation of CeO2, in 
   which i have layers of Ce and O alternating , and terminating with
   Ce layer on one end and O layer on the other end. Hence the system 
   has a depolarization field which needs to be corrected.
           I don't know how to introduce an artificial electric field
   in the vacuum region in order to cancel the depolarization field.
           I am not able to figure out the 'input variables' for the 
   above purpose. 

 regards,
 Gargi