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摘要翻译：
利用分子动力学计算机模拟，从完全刚性棒状粒子极限到非常柔性粒子，从高密度区到各向同性相，追踪了具有不同内部柔性度的棒状粒子体系的相行为。从完全刚性棒极限和提高内部柔韧性出发，近晶A相的范围在较高密度下被几乎不受影响的晶相和较低密度下的向列相的共同作用挤出，直至消失。这些结果证实了前人理论、模拟和实验研究中的假设，即近晶A相是通过引入和提高颗粒内部柔性程度来失稳的。然而，随着粒子内部柔韧性的变化，从向列到近晶的相变顺序并没有明显的变化，层间距的大小也没有明显的变化。此外，还没有得到柱状相的证据，而柱状相被认为是柔性棒中近晶a相的可能替代品。
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英文标题：
《Phase behavior of wormlike rods》
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作者：
Giorgio Cinacchi, Luca De Gaetani
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
By employing Molecular Dynamics computer simulations, the phase behavior of systems of rodlike particles with varying degree of internal flexibility has been traced from the perfectly rigid rod limit till very flexible particles, and from the high density region till the isotropic phase. From the perfectly rigid rod limit and enhancing the internal flexibility, the range of the smectic A phase is squeezed out by the concomitant action of the scarcely affected crystalline phase at higher density and the nematic phase at lower density, until it disappears. These results confirm the supposition, drawn from previous theoretical, simulational and experimental studies, that the smectic A phase is destabilized by introducing and enhancing the degree of particle internal flexibility. However, no significant changes in the order of nematic--to--smectic A phase transition, which appears always first order, nor in the value of the layer spacing, are observed upon varying the degree of particle internal flexibility. Moreover, no evidence of a columnar phase, which was tought of as a possible superseder of the smectic A phase in flexible rods, has been obtained.
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PDF链接：
https://arxiv.org/pdf/711.1741
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