[SIESTA-L] Zone center phonons with unit cell or Supercell ?

[sonu kumar]

hi dear all

I want to calculate the phonons at gamma point of the BZ.

1) Do i need to make the supercell to find the phonons ? is a  unit cell is
sufficient for it?

2) which unit cell i mean whether primitive or conventional unit should i
use?



with regards,

1009U