Minimal Microscopic Model for Liquid Polyamorphism and Waterlike Anomalies
Minimal Microscopic Model for Liquid Polyamorphism and Waterlike Anomalies
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DOI：
10.1103/physrevlett.127.185701
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发表时间：
2021-10-27
影响因子：
8.6
通讯作者：
Anisimov, Mikhail A.
中科院分区：
文献类型：
--
作者：
Caupin, Frederic;Anisimov, Mikhail A.
液体多晶现象是一种有趣的可能性，一个单一的组分物质存在于多个液相。我们提出了一个最小的模型，这种现象。从一个二元晶格模型与临界非均质和液-液分层，我们允许相互转换的两个物种，把系统变成一个单组分流体的两个不同的状态在能量和熵。揭示的noninterconverting二元混合物的相图提供了前所未有的洞察力的相互转换的流体，如液-液过渡的临界点，或无奇点的情况下，表现出热力学异常，没有多晶性的相行为。该模型提供了一个统一的理论框架来描述过冷水和各种多晶液体与水的异常。
Liquid polyamorphism is the intriguing possibility for a single component substance to exist in multiple liquid phases. We propose a minimal model for this phenomenon. Starting with a binary lattice model with critical azeotropy and liquid-liquid demixing, we allow interconversion of the two species, turning the system into a single-component fluid with two states differing in energy and entropy. Unveiling the phase diagram of the noninterconverting binary mixture gives unprecedented insight on the phase behaviors accessible to the interconverting fluid, such as a liquid-liquid transition with a critical point, or a singularity-free scenario, exhibiting thermodynamic anomalies without polyamorphism. The model provides a unified theoretical framework to describe supercooled water and a variety of polyamorphic liquids with waterlike anomalies.