# Tersoff parameters for various elements and mixtures
# multiple entries can be added to this file, LAMMPS reads the ones it needs
# these entries are in LAMMPS "metal" units:
# A,B = eV; lambda1,lambda2,lambda3 = 1/Angstroms; R,D, ZBLcut = Angstroms; Z_i, Z_j = electron charge units
# other quantities are unitless
# These parameters are from Devanathan JNM 1998, adapted to fit the form used in LAMMPS (tersoff PRB 37 1988 instead of 1989 form)
# Z_i, Z_j are the charges of the i,j th nuclei from the coulomb potential
# ZBLcut is the ZBL cutoff parameter (should be less than 1.0 angstrom), ZBLexpscale is the scaling parameter in the exponential of the smoothing function
# These parameters have been taken from Devanathan et al JNM 253, 1998 and a private communication on the ZBL potential, thanks goes to Ram Devanathan for help
# with the ZBL potential.
# format of a single entry (one or more lines):
# element 1, element 2, element 3,
# m, gamma, lambda3, c, d, h, n, beta, lambda2, X_ij*B, R, D, lambda1, A, Z_i, Z_j, ZBLcut, ZBLexpscale
