On Nov 19, 2007, at 12:31 , Ion Errea wrote: > Does anyonone which are the reasons why you can get imaginary > displacements for phonon eigenmodes?
at q=0 both the dynamical matrix and its eigenvectors are real, but for a general q, the dynamical matrix is complex hermitian and its eigenvectors are in general complex Paolo --- Paolo Giannozzi, Dept of Physics, University of Udine via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
