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

被引：20
|
作者：
Piglowski, Pawel M. [1 ]
Narojczyk, Jakub W. [1 ]
Wojciechowski, Krzysztof W. [1 ]
Tretiakov, Konstantin V. [1 ]
机构：
[1] Polish Acad Sci, Inst Mol Phys, Mariana Smoluchowskiego 17, PL-60179 Poznan, Poland
来源：
SOFT MATTER | 2017年 / 13卷 / 43期
关键词：
NEGATIVE POISSONS RATIO; LINEAR COMPRESSIBILITY; ELASTIC PROPERTIES; STATISTICAL ENSEMBLES; CARBON NANOSTRUCTURES; FUNCTIONAL MATERIALS; MOLECULAR-DYNAMICS; ANISOTROPIC SOLIDS; CUBIC MATERIALS; ELECTRIC-FIELD;
D O I：
10.1039/c7sm01231d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：7916 / 7921
页数：6
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