disp-script.rst

euphonic-dispersion

The euphonic-dispersion program can be used to plot dispersion either along a specific trajectory from precalculated phonon frequencies, or along a recommended reciprocal space path from force constants. For example, to plot from a Euphonic .json file containing QpointPhononModes, with frequencies reordered to follow equivalent modes across Q, and the y-axis minimum energy set to 0 meV, run:

euphonic-dispersion quartz_qpoint_phonon_modes.json --reorder --e-min 0

Or, to plot along a recommended q-point path from Phonopy force constants with an acoustic sum rule, run:

euphonic-dispersion NaCl/phonopy.yaml --asr reciprocal

To see all the command line options, run:

euphonic-dispersion -h

You can also see the available command line options below. For information on advanced plot styling, see :ref:`styling`.

Command Line Options

.. argparse::
   :module: euphonic.cli.dispersion
   :func: get_parser
   :prog: euphonic-dispersion