This is an example using the exciting interface.

To create supercells with atomic displacements, run:

```bash
% phonopy-init --exciting -c input.xml -d --dim="4 4 4"
```

This command creates a perfect (4 \times 4 \times 4) supercell (`supercell.xml`) and a displaced (4 \times 4 \times 4) supercell (`supercell-001.in`).

Create a directory named `001` and copy `supercell-001.in` into it as `input.xml`. The `input.xml` file must then be modified by adding the `groundstate` block from the original input file and adjusting the k-point mesh appropriately for the supercell calculation. In addition, copy the required species files (e.g., `Si.xml`) into the `001` directory, or alternatively update the `speciespath` attribute to point to the directory containing the species files.

When running supercell calculations with exciting, it is important to use the SIRIUS library.

Once the calculation has finished, generate the `FORCE_SETS` file by running:

```bash
% phonopy-init --exciting -f 001/INFO.OUT
```
