[Pw_forum] Raman spectra for (almost) metallic systems

[Konstantin Kudin]

 Hi all,

 My question is if there is any hope to a get a meaningful non-resonant
Raman spectra from the PH program for something almost metallic, like
graphite.

 Basically, how are these Raman tensors (d^3 E/ dx de1 de2) are
computed, will they totally break down for something with a small gap?
Or is there a bit of hope there?

 Thanks!
 Kostya

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