[Pw_forum] phonon structure factor

[Steven Hahn]

Dear all,

I am trying to calculate the phonon structure factor from the  
matdyn.modes file. The textbook I am using shows two different  
definitions of the  polarization vector that differ by exp(iqd),  
where d is the position vector to the dth atom within the unit cell.  
How is the polarization vector defined in PWSCF?

Steven Hahn
Graduate Student
Department of Physics and Astronomy
Iowa State University
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