Separation and fractionation of order and disorder in highly polydisperse systems



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Fernández Pérez, Luis Antonio and Martín Mayor, Víctor and Seoane, B. and Verrocchio, P. (2010) Separation and fractionation of order and disorder in highly polydisperse systems. Physical review E, 82 (2). ISSN 1539-3755

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We study a polydisperse soft-spheres model for colloids by means of microcanonical Monte Carlo simulations. We consider a polydispersity as high as 24%. Although solidification occurs, neither a crystal nor an amorphous state are thermodynamically stable. A finite size scaling analysis reveals that in the thermodynamic limit: a the fluid-solid transition is rather a crystal-amorphous phase-separation, b such phase-separation is preceded by the dynamic glass transition, and c small and big particles arrange themselves in the two phases according to a complex pattern not predicted by any fractionation scenario.

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© 2010 The American Physical Society.We acknowledge BIFI cluster and CINECA for 2 x 10^(5) h of computer time. We have been partly supported through Research Contracts No. FIS2006-08533, No. FIS2009-12648-C03-01, and No. FIS2008-01323 MICINN, Spain and by UCM-Banco de Santander Grant No. GR58/ 08. B.S. was supported by the FPU program (Spain).

Uncontrolled Keywords:Monte-Carlo method; Crystal nucleation; Hard-spheres; Glasses, Liguids.
Subjects:Sciences > Physics
Sciences > Physics > Physics-Mathematical models
ID Code:37828
Deposited On:26 May 2016 09:39
Last Modified:27 May 2016 07:54

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