Auxeticity enhancement due to size polydispersity in fcc crystals of hard-core repulsive Yukawa particles

• DOI: 10.1039/c7sm01231d
• Publication Date: 2017-10-16T08:53:15Z
• Authors: Paweł M. Pigłowski; Jakub W. Narojczyk; Krzysztof W. Wojc...; Konstantin V. Tre...
• Keywords: Auxetics; Yukawa potential; Dispersity; Poisson's ratio; Isothermal process; Particle (ecology)

The Poisson's ratio of the fcc hard-core repulsive Yukawa crystals with size polydispersity was determined by Monte Carlo simulations in isothermal-isobaric ensemble. effect on auxetic properties has been studied. It found that an increase particle causes a decrease directions as well appearance negative formerly non-auxetic directions. A measure auxeticity introduced to estimate quantitatively enhancement polydisperse crystals. proposed can be applied appraise any studied system.