Atomic classes

Rearrangement processes

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Glass formation and glassy dynamics are studied using a mobile cluster, static boundary model. For the two-dimensional Lennard-Jones glass, we examine the nature of the rearrangement processes that characterizes glassy dynamics, the correlation functions of the hexadic order parameter, the temperature dependence of the distribution of relaxation times, and the dependence of these properties both on the disorder within the static boundary and on the temperature. The mobile cluster passes from a low temperature disordered material to an intermediate temperature amorphized material to a high temperature liquid; during this thermal history, the distribution of relaxation times exhibits nonexponential behavior in the glassy region, and becomes Debye-like in the liquid phase. We see a chain of local structural rearrangements in a small cluster of eight particles representing characteristic elementary kinetic events in this very simple model of glass behavior. The possibility to interpret these events in terms of defect motion is discussed.

Original languageEnglish
Pages (from-to)6519-6529
Number of pages11
JournalJournal of Chemical Physics
Volume110
Issue number13
DOIs
Publication statusPublished - 1999 Apr 1

Fingerprint

glass
relaxation time
Glass
Relaxation time
Temperature
liquid phases
histories
disorders
Liquids
temperature dependence
temperature
defects
kinetics
liquids
Defects
Kinetics
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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abstract = "Glass formation and glassy dynamics are studied using a mobile cluster, static boundary model. For the two-dimensional Lennard-Jones glass, we examine the nature of the rearrangement processes that characterizes glassy dynamics, the correlation functions of the hexadic order parameter, the temperature dependence of the distribution of relaxation times, and the dependence of these properties both on the disorder within the static boundary and on the temperature. The mobile cluster passes from a low temperature disordered material to an intermediate temperature amorphized material to a high temperature liquid; during this thermal history, the distribution of relaxation times exhibits nonexponential behavior in the glassy region, and becomes Debye-like in the liquid phase. We see a chain of local structural rearrangements in a small cluster of eight particles representing characteristic elementary kinetic events in this very simple model of glass behavior. The possibility to interpret these events in terms of defect motion is discussed.",
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Atomic classes : Rearrangement processes. / Sim, Eun Ji.

In: Journal of Chemical Physics, Vol. 110, No. 13, 01.04.1999, p. 6519-6529.

Research output: Contribution to journalArticle

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T1 - Atomic classes

T2 - Rearrangement processes

AU - Sim, Eun Ji

PY - 1999/4/1

Y1 - 1999/4/1

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