胶体模型中的可重入旋节和Speedy方案
Reentrant spinodals and the Speedy scenario in colloidal model systems
摘要：
提出了一种重入式气液旋节线，作为过冷水的压缩性和比热表观发散的可能解释。这种违反直觉的可能性，例如在正压下冷却时液体变得不稳定，类似气体波动，从未在真实物质中或非晶格模拟中观察到。最近，这种重入的情况下已被驳回的前提下，重入的旋节将碰撞的气-液双节在压力-温度平面。在这里，我们研究，数值和分析，两个先前介绍的单组分斑块粒子模型，都显示（i）一个再入的旋节和（ii）一个再入的双节，提供了一个整洁的在硅片（和在charta）实现这种非常规的热力学场景。
英文摘要：
A re-entrant gas-liquid spinodal was proposed as a possible explanation of the apparent divergence of the compressibility and specific heat on supercooling water. Such a counter intuitive possibility, e.g. a liquid that becomes unstable to gas-like fluctuations on cooling at positive pressure, has never been observed, neither in real substances nor in off-lattice simulations. More recently, such re-entrant scenario has been dismissed on the premise that the re-entrant spinodal would collide with the gas-liquid binodal in the pressure-temperature plane. Here we study, numerically and analytically, two previously introduced one-component patchy particle models that both show (i) a re-entrant spinodal and (ii) a re-entrant binodal, providing a neat in silico (and in charta) realization of such unconventional thermodynamic scenario.
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