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Keywords:

  • auxetic;
  • elasticity;
  • hard-core repulsive Yukawa model;
  • negative Poisson's ratio

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 (inline image) and contact value of the potential (inline image) 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 inline image 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 inline image directions at inline image versus density.