<div>Dear all PWscf users,</div> <div><BR> I want to investigate Raman spectra in the case of large system. How to use<BR> the finite electric fields method by pwscf or the perturbative variational approach for calculation of dielectric tensors [in RAMAN SPECTRA OF DISORDERED OXIDES FROM FIRST PRINCIPLES by PAOLO UMARI]? </div> <div>I did not find those from the forum.<BR> <BR>Thank you in advance!<BR> <BR>Niu Li</div><p>
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