Number of the records: 1
Thermodynamics of Fluid Polyamorphism
- 1.
SYSNO ASEP 0491218 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermodynamics of Fluid Polyamorphism Author(s) Anisimov, M. A. (US)
Duška, Michal (UT-L) RID, ORCID
Caupin, F. (FR)
Amrhein, L. E. (US)
Rosenbaum, A. (US)
Sadus, R. J. (AU)Article number 011004 Source Title Physical Review X. - : American Physical Society - ISSN 2160-3308
Roč. 8, č. 1 (2018)Number of pages 18 s. Publication form Print - P Language eng - English Country US - United States Keywords liquid phase-transition ; supercooled water ; high-pressure Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Institutional support UT-L - RVO:61388998 UT WOS 000419715500001 EID SCOPUS 85041030481 DOI 10.1103/PhysRevX.8.011004 Annotation Fluid polyamorphism is the existence of different condensed amorphous states in a single-component fluid. It is either found or predicted, usually at extreme conditions, for a broad group of very different substances, including helium, carbon, silicon, phosphorous, sulfur, tellurium, cerium, hydrogen, and tin tetraiodide. This phenomenon is also hypothesized for metastable and deeply supercooled water, presumably located a few degrees below the experimental limit of homogeneous ice formation. We present a generic phenomenological approach to describe polyamorphism in a single-component fluid, which is completely independent of the molecular origin of the phenomenon. We show that fluid polyamorphism may occur either in the presence or in the absence of fluid phase separation depending on the symmetry of the order parameter. In the latter case, it is associated with a second-order transition, such as in liquid helium or liquid sulfur. To specify the phenomenology, we consider a fluid with thermodynamic equilibrium between two distinct interconvertible states or molecular structures. A fundamental signature of this concept is the identification of the equilibrium fraction of molecules involved in each of these alternative states. However, the existence of the alternative structures may result in polyamorphic fluid phase separation only if mixing of these structures is not ideal. The two-state thermodynamics unifies all the debated scenarios of fluid polyamorphism in different areas of condensed-matter physics, with or without phase separation, and even goes beyond the phenomenon of polyamorphism by generically describing the anomalous properties of fluids exhibiting interconversion of alternative molecular states. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2019
Number of the records: 1