Journal Article

PreJuSER-19666

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Modeling aging rates in a simple glass and its melt

Schober, H. R.FZJ*

2012
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10883  doi:10.1103/PhysRevB.85.024204

Abstract: We calculated with a molecular dynamics simulation the aging rates in a binary Lennard-Jones glass and its undercooled melt. At temperatures above the mode coupling theory (MCT) critical temperature T-c, pressure or volume, internal energy, and diffusivity age with the same rate. Below T-c we see a split of the aging rates into a fast one for the diffusivity and a much slower one for pressure or volume and internal energy. The latter aging rate is roughly proportional to the diffusivity. The observed stretched exponential behavior is shown to stem from the faster aging of the diffusivity. Aging of of internal energy and pressure proceeds exponentially with the mean-square displacement. The exponential prefactor exhibits the kink at T-c seen earlier in the pressure dependence of the diffusivity.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2012

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Database coverage:
; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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