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# Contributors:
#    Daniel S. Karls
#    Ellad B. Tadmor
#    Ryan S. Elliott
#    Ben C. Druecke
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Modified three-body cluster Stillinger-Weber potential for improved
surface properties due to Stephenson, Radny and Smith.

Stillinger FH, Weber TA (1985),
Computer simulation of local order in condensed phases of silicon.
Physical Review B 31(8):5262-5271. doi:10.1103/PhysRevB.31.5262

Stephenson PCL, Radny MW, Smith PV (1996),
A modified Stillinger-Weber potential for modelling silicon surfaces.
Surface Science 366(1):177-184. doi:10.1016/0039-6028(96)00801-1

This driver reads in one parameter file with the species followed by
thirteen (13) parameters (required units indicated in square brackets following
the parameter):

species
A 	[unitless]
B 	[unitless]
p 	[unitless]
q 	[unitless]
a 	[unitless]
lambda 	[unitless]
gamma 	[unitless]
zeta    [unitless]
b       [unitless]
k       [unitless]
c       [unitless]
sigma 	[Angstrom]
epsilon [eV]

