Syntax:

phonon <key1> <args1...>  <key2> <args2...>  ...

Note: only available in calculations using the 'phonon' executable.

Description:

Control phonon calculation and output. The possible <key>'s and their corresponding arguments are:

supercell <N0> <N1> <N2>

Supercell for frozen phonon perturbation. Each entry must divide the corresponding value in kpoint-folding. The k-point mesh must be uniform and centered on Gamma.
dr <dr>

Amplitude (in bohrs) of frozen phonon perturbation (default 0.01).
T <T>

Temperature (in Kelvins) used for vibrational free energy estimation (default 298).
Fcut <Fcut>

Fillings threshold to include in supercell calculation (default 1e-8). The unit cell calculation may have extra bands for which matrix elements are desired; this flag ensures that those extra bands do not affect the performance or memory requirements of the supercell calculations.

Requires: (None)

Forbids: fix-electron-density fix-electron-potential

Allow multiple: no

Default: (None)