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Communication: Re-entrant limits of stability of the liquid phase and the Speedy scenario in colloidal model systems

Autor(en)
Lorenzo Rovigatti, Valentino Bianco, Jose Maria Tavares, Francesco Sciortino
Abstrakt

A re-entrant gas-liquid spinodal was proposed as a possible explanation of the apparent divergence of the compressibility and specific heat off 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 a reentrant scenario has been dismissed on the premise that the re-entrant spinodal would collide with the gas-liquid coexisting curve (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 limit of stability of the liquid phase and (ii) a re-entrant binodal, providing a neat in silico (and in charta) realization of such unconventional thermodynamic scenario.

Organisation(en)
Computergestützte Physik und Physik der Weichen Materie
Externe Organisation(en)
University of Oxford, Instituto Politécnico de Lisboa, Universidade de Lisboa, Università degli Studi di Roma La Sapienza, Consiglio Nazionale delle Ricerche
Journal
Journal of Chemical Physics
Band
146
Anzahl der Seiten
5
ISSN
0021-9606
DOI
https://doi.org/10.1063/1.4974830
Publikationsdatum
01-2017
Peer-reviewed
Ja
ÖFOS 2012
103015 Kondensierte Materie
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/8b222e84-37ae-463e-a023-ffe58c4c6a71