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

Artificial Material with Negative Thermal Expansion: A Simple Geometrical Approach