Heterogeneous dynamics on the microsecond scale in simulated Ni0.5 Zr0.5 metallic melts far below the glass temperature.
From molecular dynamics simulations for up to 2.5 micros, results are reported on structural dynamics in glass-forming metallic Ni(0.5) Zr(0.5) melts at 700 and 785 K. After elimination of high-frequency fluctuations, cascades of atoms and avalanches of atom chains, local in space and time, are identified as complex processes that govern the heterogeneous low-frequency dynamics in sufficiently aged structures near the glass temperature.
Teichler
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Institute for Materials Physics and SFB 605, University of Goettingen, Germany.