Minimal microscopic model for liquid polyamorphism and water-like anomalies
arXiv:2104.08117 · doi:10.1103/PhysRevLett.127.185701
Abstract
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 non-interconverting 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 water-like anomalies.
15 pages, 11 figures
References in corpus (8)
- Metastable liquid-liquid coexistence and density anomalies in a core-softened fluid
- Compressibility anomalies in stretched water and their interplay with density anomalies
- Thermodynamics of Fluid Polyamorphism
- Liquid-Liquid Phase Transition in Supercooled Silicon
- The stability-limit conjecture revisited
- Insight into liquid polymorphism from the complex phase behaviour of a simple model
- Critical points, phase transitions and water-like anomalies for an isotropic two length scale potential with increasing attractive well
- Free energy calculations and unbiased dynamics reveal a continuous liquid-liquid transition in water no man's land