Cooperative Jump Motions in Colloidal Glass

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概要

• 論文の詳細を見る

• We report Brownian dynamics simulation results on binary colloidal mixtures of particles of two different diameters interacting via a repulsive DLVO potential. As the effective temperature is lowered by reducing charged impurity concentration, a transition from liquid to crystal at a total volume fraction φ of 0.2 and to glassy state at φ = 0.3 are observed. The mean squared displacements show a marked subdiffusive behavior at intermediate and long times below a certain temperature. The particle motion in supercooled liquid with φ = 0.3 is strongly cooperative as revealed by mean squared displacements, self-part of van-Hove density correlation functions and non-Gaussian parameter. Interestingly, a few particles exhibit cooperative hop and subsequent hop-back motion at temperatures very close to the glass transition.

• 理論物理学刊行会の論文
• 1997-06-27

著者

• Sanyal Subrata

  Department Of Chemical Engineering University Of California

• SANYAL S.

  Department of Physics, Banaras Hindu University

• SOOD Ajay

  Department of Physics, Indian Institute of Science

• Sood Ajay

  Department Of Physics Indian Institute Of Science

• SANYAL Subrata

  Department of Chemical Engineering, University of California

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