[Pw_forum] on finite electric field method

[li niu]

Dear all ,
  
  I want to investigate Raman spectra in the case of large disordered system from first principles. I saw the exmple30 and 31, but they only gave the dielectric constant and Born effective charge by Moden polarizability theory.
   Can the espresso-3.2 code be used to calculate Rman scattering   by 
  numerically calculating second derivatives of  the atomic forces with respect
   to the electric field? 
    Where can I obtain CPV code?
     
  I did not find those from the forum.

Thank you in advance!

Niu Li


       
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