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Si example with 'SYMMETRY = .FALSE.'. Normally disabling symmetry is not useful. So the reason this setting exists is for the test, which whould depend on each detailed reason.
Usage:
A set of supercells with displacements and its disp.yaml are created by
% phonopy --dim="2 2 2" -d --nosym
There are 12 displacements, which means 6 directions for each atom in the input unit cell. FORCE_SETS is created by
% phonopy -f vasprun_xmls/disp-{001..012}/vasprun.xml
Phonopy should be run with 'SYMMETRY = .FALSE.' or '--nosym'.
% phonopy mesh.conf
The result of the phonopy calculation may be compared with the example found in Si directory.
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