论文标题
在两个维度上的硬质超速熔化的三步熔化
Three-step melting of hard superdisks in two dimensions
论文作者
论文摘要
我们通过复制 - 交换蒙特卡洛模拟硬盘模拟硬盘和正方形的二维系统的熔化场景之间的联系。众所周知的熔化场景在磁盘和正方形限制中观察到，而我们观察到了双层形状的不寻常的三步方案。我们发现两个中间机介导熔化：近示射相和$ d_2 $局部对称性的另一个流体相，我们称其为菱形，其中键和粒子定向订单都是准长范围。我们的结果表明，液晶形成分子的熔化过程不仅可以复杂，因此细长的形状稳定了几种中间酶，而且还可以稳定各向异性的准透明分子。
We explore the link between the melting scenarios of two-dimensional systems of hard disks and squares through replica-exchange Monte Carlo simulations of hard superdisks. The well-known melting scenarios are observed in the disk and square limits, while we observe an unusual three-step scenario for dual-shapes. We find that two mesophases mediate the melting: a hexatic phase and another fluid phase with a $D_2$ local symmetry, we call it rhombatic, where both bond and particle orientational orders are quasi-long-range. Our results show that not only can the melting process of liquid-crystal forming molecules be complicated, where elongated shapes stabilize several mesophases, but also that of anisotropic quasispherical molecules.
