  In the paper we report the modeling and design of material which has a
negative thermal expansion (NTE). The basic assumption is a potential between
the atoms in the material can be approximated by a Lennard-Jones potential
(6-12) and the dominant interaction is only between nearest neighbors. We show
that the material formed by alternating atomic layers wherein each layer
contains a type of atom, and geometry of the arrangement of atoms is
triangular, may experience an NTE when sigma_AA = sigma_BB = sigma_AB,
epsilon_AA = epsilon_BB < epsilon_AB/4 are satisfied, where sigma_ij and
epsilon_ij are Lennard-Jones parameters
