[Pw_forum] imaginary eigenvectors

[Stefano de Gironcoli]

Eigenvectors are defined up to a phase factor which is picked 
somehow randomly by the diagonalization routine.
nothing special in an immaginary eigenvector.

stefano

On Fri, 26 May 2006, Eric Abel wrote:
> Hello,
>
> I had a quick phonon question...is there a physical interpretation to a mode 
> which is imaginary with a positive frequency?
>
> Eric
>
>
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