[Pw_forum] Strange behavior of phonon calculation

[Paolo Giannozzi]

On Jul 5, 2007, at 22:48 , Srijan Kumar Saha wrote:

>   My  calculated total energy for a metal (spin-less)  is
>
>    total energy              =   -22.79040567 Ry    and  
> corresponding gamma phonon frequency = 736 cm-1
>
>
>   When  I switch on the spin  tag to specify the spin polarized  
> calculation for
>   the same sample, then I got
>
>   total energy              =   -22.79040581 Ry  and  corresponding  
> gamma phonon frequency = 750 cm-1
>
>   while all the other input parameters are exactly same.

please provide a job demostrating such behaviour

Paolo
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Paolo Giannozzi, Democritos and University of Udine, Italy