Syntax:
improper_style fourier
Examples:
improper_style fourier improper_coeff 1 100.0 180.0
Description:
The fourier improper style uses the following potential:
where K is the force constant and omega is the angle between the IL axis and the IJK plane:
If all parameter (see bellow) is not zero, the all the three possible angles will taken in account.
The following coefficients must be defined for each improper type via the improper_coeff command as in the example above, or in the data file or restart files read by the read_data or read_restart commands:
Restrictions:
This angle style can only be used if LAMMPS was built with the USER_MISC package. See the Making LAMMPS section for more info on packages.
Related commands:
Default: none
(Mayo) Mayo, Olfason, Goddard III, J Phys Chem, 94, 8897-8909 (1990),