Molecular dynamics simulations of glasses
We present MD simulations of two glass-forming structures (Se and SiO2) at temperatures above and below the glass transition. In both structures we find the relaxations to be localized on a small number of atoms. However, both the number of atoms involved in jumps and the jump-length grow with tempe...
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Published in | Journal of non-crystalline solids Vol. 250-252; pp. 651 - 654 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.08.1999
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Subjects | |
Online Access | Get full text |
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Summary: | We present MD simulations of two glass-forming structures (Se and SiO2) at temperatures above and below the glass transition. In both structures we find the relaxations to be localized on a small number of atoms. However, both the number of atoms involved in jumps and the jump-length grow with temperature. In Se the relaxing units form typically chain-like structures. In the simulations of SiO2-glasses we observe that the displacement of the oxygen is larger than the corresponding Si contribution. In these cases the relaxations occur predominantly at atoms which are topological defects (under- or rarely over-coordinated). |
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ISSN: | 0022-3093 1873-4812 |
DOI: | 10.1016/S0022-3093(99)00151-9 |