[Pw_forum] *.fc file in PW_SCF help.

[xirainbow]

Dear Paolo Giannozzi:



> >what is the meaning of "force constants"? ( hint: second derivative of
> >the energy with respect to atomic displacements )


Thanks for your hint. I got it:)


> ____________________________________
> Hui Wang
> School of physics, Nankai University, Tianjin, China
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