标题： 硬剪切立方体族的相行为 显示英文标题

标题： Phase behavior of hard sheared cube family

摘要： 一个剪切立方体是通过在一个方向上对立方体施加剪切而形成的，其中一个面保持固定。 我们在这里研究了这样一组规则硬剪切立方体的热力学相行为，这组中的每个成员都有由面与固定面法线所成的独特角度。 对于这些各向异性的构建块进行了硬粒子蒙特卡洛（HPMC）模拟，得到了熵驱动的自组装现象。 由此在晶体中发现了离散塑性晶体相的计算证据。 已知离散塑性晶体相是通过某些多面体的自发自组装形成的。 在整个固态区域内，在熔化成液体之前，粒子取向表现出强烈的特定相关性，而在低密度固体中没有发现自由旋转的塑性晶体。 我们彻底观察到，形状的几何属性并未决定这里报道的这一指向无序相的任何性质。 我们还发现，粒子的旋转对称轴与晶体单位晶胞的一个旋转对称轴在空间排列上有很强的相关性。 这些结果是通过对具有晶体点群对称性的形状获得的，并被研究为与先前使用非晶体点群对称硬粒子工作所建立的离散塑性晶体相的物理现象一致。 显示英文摘要

摘要： A sheared cube is made out of a cube by giving a shear to the body in one direction keeping one of the faces fixed. We investigate here the thermodynamic phase behavior of a family of such regular hard sheared cubes, each of the members of the family having a distinct angle made by the faces with the perpendicular on the fixed face. Hard particle Monte Carlo (HPMC) has been performed with these anisotropic building blocks resulting entropy-driven self assembly. Thereby computational evidence of discrete plastic crystal phase has been found in crystal. The discrete plastic crystal phase is known to form through the spontaneous self-assembly of certain polyhedra. Throughout the entire solid regime particle orientations exhibit strong specific correlations before melting into a liquid, without any evidence of freely rotating plastic crystal at lower density solid. It has been thoroughly observed that geometrical attributes of the shapes don't determine any of the properties that designate this orientational disorder phase reported here. We also find that particle's rotational symmetric axes and one of the rotational symmetric axes of the unit cell of the crystal have a strong relationship in their alignment in space. These results, achieved with shapes having crystallographic point group symmetry, are investigated as being consistent with the phenomenology of discrete plastic crystal phase established in earlier works with hard particles having non-crystallographic point group symmetry.