Dear eli: "*E*" means it is a double-degenerate mode. "*u*" means it is antisymmetry under inversion operation. You will find more information in books about "lattice dynamics"
On Sun, Jun 20, 2010 at 8:33 PM, eli <elahe_afrodit at yahoo.com> wrote: > dear all > in phonon calculation in output of ph.x, what is irreducible > representations? "for example 2 modes -E-2u" > Elahe Teimouri > Computational Condensed Matter Research Lab > Physics Department, Isfahan University of Technology, Isfahan, Iran > > ____________________________________ Hui Wang School of physics, Nankai University, Tianjin, China -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20100620/c1388152/attachment.htm
