论文标题
吸引力驯服二维熔化：从连续到不连续的过渡
Attraction tames two-dimensional melting: from continuous to discontinuous transitions
论文作者
论文摘要
二维系统可能会接受不同本质的示型阶段和示型液的转变。证明它们的相图具有挑战性，实际上只是硬盘，硬规则多边形和逆向幂律势的确定，直到最近才被最近澄清。在这种情况下，尽管它们在分子尺度和胶体尺度上都普遍存在，但吸引力的作用目前是投机性的。在这里，我们通过数值模拟证明，吸引力促进了不连续的融化场景而没有示象相。在高温下，Lennard-Jones颗粒和有吸引力的多边形分别遵循形状主导的熔化场景，分别在硬盘和硬质多边形中观察到。相反，所有系统通过一阶过渡融化，在低温下没有示象相，在那里，吸引力占主导地位。中等温度熔化方案是形状依赖性的。我们的结果表明，在胶体实验中，吸引力强度的可调性可以观察同一系统中不同的熔融方案。
Two-dimensional systems may admit a hexatic phase and hexatic-liquid transitions of different natures. The determination of their phase diagrams proved challenging, and indeed those of hard-disks, hard regular polygons, and inverse power-law potentials, have been only recently clarified. In this context, the role of attractive forces is currently speculative, despite their prevalence at both the molecular and colloidal scale. Here we demonstrate, via numerical simulations, that attraction promotes a discontinuous melting scenario with no hexatic phase. At high-temperature, Lennard-Jones particles and attractive polygons follow the shape-dominated melting scenario observed in hard-disks and hard polygons, respectively. Conversely, all systems melt via a first-order transition with no hexatic phase at low temperature, where attractive forces dominate. The intermediate temperature melting scenario is shape-dependent. Our results suggest that, in colloidal experiments, the tunability of the strength of the attractive forces allows for the observation of different melting scenario in the same system.
