准一维超盘流体中紧密堆积特性的普遍性及各向同性到四向相变的标志物

Sakineh Mizani, Martin Oettel, Péter Gurin, Szabolcs Varga
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引用次数: 0

摘要

我们研究了硬超盘(介于圆盘和正方形之间的各向异性粒子)准一维系统的平衡态和相位,在该系统中,粒子中心受限于在一条直线上移动。当密度增大时,会发现从准各向异性相到四元相的连续变化。有些出乎意料的是,对于等压态,四元相中较大且各向异性较强的粒子系统比准各向异性相中较小且各向异性较弱的粒子系统密度要大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Universality of the close packing properties and markers of isotropic-to-tetratic phase change in quasi-one-dimensional superdisk fluid
We study equilibrium states and phases of a quasi-one-dimensional system of hard superdisks (anisotropic particles interpolating between disks and squares) where the centers of the particles are constrained to move on a line. A continuous change from a quasi-isotropic to a tetratic phase is found upon increasing the density. Somewhat unexpected, for isobaric states, systems with larger and more anisotropic particles in the tetratic phase are denser than systems with smaller and less anisotropic particles in a quasi-isotropic phase. Close packing behaviour is characterised by exponents describing the behaviour of the pressure, the angular fluctuations and the angular correlation length. We obtain two universal, shape-independent relations between them.
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