[Pw_forum] Which subroutine is related to the atomic displacement in DFPT

[Caloma Trumica]

Dear All,

I could not find the name of the subroutine, which applies a pattern of
atomic displacements in order to get the wavefunction perturbation in any q
vector? Could you please help me out? It is supposed to be hidden somewhere
in "PH" folder.

Thanks.

Andy Lau  Postgraduate student from HKUST, China
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