This file contains the squared frequencies \(\omega^2(\boldsymbol{k})\) at different \(\boldsymbol{k}\)-points.

File format

There are N_kpoints rows and 3 * N_basis columns, where N_basis is the number of basis atoms in the unit cell defined in the input file and N_kpoints is the number of \(\boldsymbol{k}\)-points in the input file.

Each line corresponds to one \(\boldsymbol{k}\)-point. Each line contains 3 * N_basis numbers, corresponding to the 3 * N_basis values for \(\omega^2(\boldsymbol{k})\) (in units of THz2) in the order of increasing magnitude.