Reference : Structural Transition in a Fluid of Spheroids: A Low-Density Vestige of Jamming

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/26109

Title :	Structural Transition in a Fluid of Spheroids: A Low-Density Vestige of Jamming
Language :	English
Author, co-author :	Cohen, A. P. [Physics Department, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel]
	Dorosz, S. [Research Unit for Physics and Materials Science, Université du Luxembourg, Luxembourg, Luxembourg]
	Schofield, A. B. [School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom]
	Schilling, Tanja [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit]
	Sloutskin, E. [Physics Department, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel]
Publication date :	2016
Journal title :	Physical Review Letters
Publisher :	American Physical Society
Volume :	116
Issue/season :	9
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	0031-9007
Keywords :	[en] Aspect ratio ; Degrees of freedom (mechanics) ; Fluids ; Jamming ; Liquids ; Thermodynamics ; Continuous deformations ; Hard spheroids ; Individual particles ; Liquid liquid phase transitions ; Nonanalyticity ; Rotational degrees of freedom ; Simple modeling ; Structural transitions ; Phase transitions
Abstract :	[en] A thermodynamically equilibrated fluid of hard spheroids is a simple model of liquid matter. In this model, the coupling between the rotational degrees of freedom of the constituent particles and their translations may be switched off by a continuous deformation of a spheroid of aspect ratio t into a sphere (t=1). We demonstrate, by experiments, theory, and computer simulations, that dramatic nonanalytic changes in structure and thermodynamics of the fluids take place, as the coupling between rotations and translations is made to vanish. This nonanalyticity, reminiscent of a second-order liquid-liquid phase transition, is not a trivial consequence of the shape of an individual particle. Rather, free volume considerations relate the observed transition to a similar nonanalyticity at t=1 in structural properties of jammed granular ellipsoids. This observation suggests a deep connection to exist between the physics of jamming and the thermodynamics of simple fluids. © 2016 American Physical Society.
Permalink :	http://hdl.handle.net/10993/26109
DOI :	10.1103/PhysRevLett.116.098001

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