[Pw_forum] inqure about the theory of infrared spectrum calculation

[xu yuehua]

hi everyone here:

i am seeking some literature or  paper about infrared intensity calculation
in PWSCF, can anyone tell me

where is it available.

thank you !

-- 
Yuehua Xu
Group of Computational Condensed Matter Physics,
National Laboratory of Solid State Microstructures and Department of
Physics,
Nanjing University,
Nanjing 210093,
P. R. China
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