[Pw_forum] question for phonon calculation

Paolo Giannozzi giannozz at democritos.it
Tue Apr 21 21:04:44 CEST 2009

On Apr 21, 2009, at 20:23 , 潘登 wrote:

> I was going to calculating phonon frequency of MgB2 at Gamma point.
> But I got the minus value at the lowest three branch.

See items 1.7.2 and 1.7.3 of
plus a large number of postings (search for "negative phonon  

> I also wonder how to apply 'asr' to my calculation

code dynmat.x

Paolo Giannozzi, Democritos and University of Udine, Italy

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