Auxeticity enhancement due to size polydispersity in fcc crystals of hard-core repulsive Yukawa particles
| Autor: | Paweł M. Pigłowski, Konstantin V. Tretiakov, Jakub W. Narojczyk, Krzysztof Wojciechowski |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Auxetics Dispersity Monte Carlo method Yukawa potential 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Poisson distribution 01 natural sciences Measure (mathematics) Hard core Condensed Matter::Soft Condensed Matter symbols.namesake 0103 physical sciences symbols Particle size 0210 nano-technology |
| Zdroj: | Soft matter. 13(43) |
| ISSN: | 1744-6848 |
| Popis: | The Poisson's ratio of the fcc hard-core repulsive Yukawa crystals with size polydispersity was determined by Monte Carlo simulations in the isothermal–isobaric ensemble. The effect of size polydispersity on the auxetic properties of Yukawa crystals has been studied. It has been found that an increase of particle size polydispersity causes a decrease of the Poisson's ratio in auxetic directions as well as appearance of a negative Poisson's ratio in formerly non-auxetic directions. A measure of auxeticity was introduced to estimate quantitatively an enhancement of auxetic properties in polydisperse Yukawa crystals. The proposed measure of auxeticity can be applied to appraise the auxeticity of any studied system. |
| Databáze: | OpenAIRE |
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