[Pw_forum] the unit of Dielectric Tensor in .dynG output file

[vu ongphuong]

Dear all users,
   
  I have 2 questions:
  1. what is the unit of (electronic) dielectric tensor in .dynG output file; for example:
   
  "Dielectric Tensor:
            6.197084791261          0.000000000000          0.000000000000
          0.000000000000          6.197084791261          0.000000000000
          0.000000000000          0.000000000000          5.774979436500"
   
  2. As I know, in the .dynG file masses are in atomic rydberg units (mass of one electron = 0.5); eigendisplacements are in units  of masses^(-1/2). If so, I want to calculate the phonon contribution dielectric constant; which units of phonon frequencies (omega) I should chose?
   
  Thank you very much.
  Ong Phuong Vu 

 		
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