PMID: 14683192Dec 20, 2003Paper

What does the potential energy landscape tell us about the dynamics of supercooled liquids and glasses?

Physical Review Letters
B Doliwa, Andreas Heuer

Abstract

For a model glass former we demonstrate via computer simulations how macroscopic dynamic quantities can be inferred from a potential energy landscape (PEL) analysis. The essential step is to consider whole superstructures of many PEL minima, called metabasins, rather than single minima. We show that two types of metabasins exist: some allowing for quasifree motion on the PEL (liquidlike), and the others acting as traps (solidlike). The activated, multistep escapes from the latter metabasins are found to dictate the slowing down of dynamics upon cooling over a much broader temperature range than is currently assumed.

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