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Partially auxetic behavior in fcc crystals of hard-core repulsive Yukawa particles



Elastic properties of the face centered cubic (fcc) phase of particles, interacting through hard-core repulsive Yukawa potential are determined by Monte Carlo (MC) simulations in the NpT ensemble with variable shape of the periodic box. The effects of the Debye screening length (math formula) and contact value of the potential (math formula) on elastic properties of the system are studied. It is found that the hard-core repulsive Yukawa system is partially auxetic. The Poisson's ratio of the system in the math formula direction is negative and decreases with increasing the Debye screening length.pssb201384244-gra-0001

Poisson's ratio of the hard-core repulsive Yukawa system measured in the math formula directions at math formula versus density.