Article (Scientific journals)
Structural Transition in a Fluid of Spheroids: A Low-Density Vestige of Jamming
Cohen, A. P.; Dorosz, S.; Schofield, A. B. et al.
2016In Physical Review Letters, 116 (9)
Peer reviewed
 

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Keywords :
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.
Disciplines :
Physics
Identifiers :
eid=2-s2.0-84960540810
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
External co-authors :
yes
Language :
English
Title :
Structural Transition in a Fluid of Spheroids: A Low-Density Vestige of Jamming
Publication date :
2016
Journal title :
Physical Review Letters
ISSN :
0031-9007
Publisher :
American Physical Society
Volume :
116
Issue :
9
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 22 March 2016

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