Dear Paolo and QE-users, The electron-phonon matrix element is written in terms of ibnd, jbnd, ik, ipert+imode0. (in elphon file) Based on your discussion with Ajit, I realize that ipert is the number of perturbations.
However, I am still having difficulty to project nirr/npert to a specific \nu. It can be easily understand they are related, though. For a phonon wave vector q, there are \nu phonon modes. These modes are categorized into nirr irreducible representations, and each nirr has npert perturbations? Can I assume one perturbation is a component of one phonon pattern? Would you please point out the relationship between npert and \nu? Thanks, Hua -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20111216/5ff26606/attachment-0001.htm
