[Pw_forum] imaginary eigenvectors

[Horacio Wagner Leite Alves]

Hello,

only to complete Stefano's observation:
to obtain an imaginary phonon wavevector, the q-vector must not be at the
high symmetric points of the Brillouin zone.

good continuation

Horacio W. LEITE ALVES
Departamento de Ciências Naturais
Universidade Federal de São João del Rei
Caixa Postal: 110  CEP: 36.300-000
São João del Rei - MG
Fone: (55)(32)33.79.24.89
Fax: (55)(32)33.79.24.83


--------- Mensagem Original --------
De: pw_forum at pwscf.org
Para: pw_forum at pwscf.org <pw_forum at pwscf.org>
Assunto: [Pw_forum] imaginary eigenvectors
Data: 26/05/06 16:19

>
> 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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