#
# KIM-API: An API for interatomic models
# Copyright (c) 2013--2022, Regents of the University of Minnesota.
# All rights reserved.
#
# Contributors:
#    Ryan S. Elliott
#
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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This directory contains a model consisting of the superposition of two shifted
Morse pair potentials with different cutoffs.

   phi_i(r) = epsilon_i * ( - exp[ -2*C_i*(r - Rzero_i) ]
                            + 2*exp[ -C_i*(r - Rzero_i) ] )
            + shift_i,

for i=1,2 and where shift_i is computed so that phi_i(rcut_i) = 0.0.  The model
uses two neighbor lists with different cutoffs and does not request neighbors
of non-contributing particles.
