[QE-users] negative phonon frequency when calculate lambda

[Chao Lei]

Dear users,

I am calculating electron-phonon using ph.x, which got negative frequency.
This is OK for me as it is expected, however, I have a question that how
does ph.x treat the negative frequency when use them to calculate the
electron-phonon coupling constant lambda ? Thanks for your reply
 if you know the answer.

Best

Chao Lei
Pos-doc
The University of Texas at Austin
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