angle_style cosine/buck6d command
Syntax
angle_style cosine/buck6d
Examples
angle_style cosine/buck6d
angle_coeff 1 cosine/buck6d 1.978350 4 180.000000
Description
The cosine/buck6d angle style uses the potential
where
The coefficients must be defined for each angle type via the angle_coeff command as in the example above, or in the data file or restart files read by the read_data or read_restart commands in the following order:
(energy) (degrees)
Additional to the cosine term the cosine/buck6d angle style computes the short range (vdW) interaction belonging to the pair_style buck6d between the end atoms of the angle. For this reason this angle style only works in combination with the pair_style buck6d styles and needs the special_bonds 1-3 interactions to be weighted 0.0 to prevent double counting.
Restrictions
cosine/buck6d can only be used in combination with the pair_style buck6d style and with a special_bonds 0.0 weighting of 1-3 interactions.
This angle style can only be used if LAMMPS was built with the MOFFF package. See the Build package doc page for more info.
Default
none