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