Dynamics, thermodynamics and structure of liquids and supercritical fluids : crossover at the Frenkel line

Fomin, Y, Ryzhov, VN, Tsiok, E, Proctor, JE, Prescher, C, Prakapenka, V, Trachenko, K and Brazhkin, VV 2018, 'Dynamics, thermodynamics and structure of liquids and supercritical fluids : crossover at the Frenkel line' , Journal of Physics: Condensed Matter, 30 (13) .

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Abstract

We review recent work aimed at understanding dynamical and thermodynamic properties of liquids and supercritical fluids. The focus of our discussion is on solid-like transverse collective modes, whose evolution in the supercritical fluids enables one to discuss the main properties of the Frenkel line separating rigid liquid-like and non-rigid gas-like supercritical states. We subsequently present recent experimental evidence of the Frenkel line showing that structural and dynamical crossovers are seen at a pressure and temperature corresponding to the line as predicted by theory and modelling. Finally, we link dynamical and thermodynamic properties of liquids and supercritical fluids by the new calculation of liquid energy governed by the evolution of solid-like transverse modes. The disappearance of those modes at high temperature results in the observed decrease of heat capacity.

Item Type: Article
Uncontrolled Keywords: Frenkel line, collective excitations, dynamical crossover, fluids, heat capacity
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Journal of Physics: Condensed Matter
Publisher: Institute of Physics
ISSN: 0953-8984
Related URLs:
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 09 May 2018 09:02
Last Modified: 20 Jul 2018 10:48
URI: http://usir.salford.ac.uk/id/eprint/46134

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