[Pw_forum] Problem with Raman and Infrared Active Modes

[HASAN SAHIN]

Dear all,

When I calculate phonon spectra of my structure I see that all the modes
(including acoustics) are both Raman and Infrared active. Being both R+IR
active of all modes seems unphysical.  Did anyone experience this type of
error ?

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*SINCERELY

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  Hasan Sahin
  Bilkent University
  National Nanotechnology Research Center

  http://www.bilkent.edu.tr/~shasan/

  http://www.researcherid.com/rid/G-4747-2010

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