Partial auxeticity induced by nanoslits in the Yukawa crystal

Monte Carlo simulations in the isobaric-isothermal ensemble with variable shape of the periodic box were used to investigate Poisson's ratios of the hard-core repulsive Yukawa crystals with periodically distributed nanoslits. Each nanoslit, oriented perpendicularly to the crystallographic direction [010], was filled by a monolayer of hard spheres. It is shown that presence of the nanoslits leads to negative Poisson's ratio, as low as -0.57(2), in the [100][001]-direction. This direction is not auxetic in the pure Yukawa crystal, i.e. shows positive Poisson's ratio, equal to 0.43(1). (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim