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Dear Abinit Users,

In the m_phonon_supercell.F90, the displaced xcart values (from their equilibrium values) are given in the freeze_displ_supercell subroutine whereas the displ function is defined in alignph.F90. Is there a reference used for these definitions?

Thanks,
Vahid

in alignph.F90 displ is a matrix, not a subroutine - it contains the phonon displacement vectors. As such there is no reference - standard phonon theory.