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- W2471917827 abstract "Using extended time series scanning transmission electron microscopy, we investigate structural fluctuations at an incommensurate grain boundary in Au. Atomic-resolution imaging reveals the coalescence of two interfacial steps, or disconnections, of different height via coordinated motion of atoms along close-packed directions. Numerical simulations uncover a transition pathway that involves constriction and expansion of a characteristic stacking fault often associated with grain boundaries in face-centered cubic materials. It is found that local atomic fluctuations by enhanced point defect diffusion may play a critical role in initiating this transition. Our results offer new insights into the collective motion of atoms underlying the lateral advance of steps that control the migration of faceted grain boundaries." @default.
- W2471917827 created "2016-07-22" @default.
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- W2471917827 date "2016-03-09" @default.
- W2471917827 modified "2023-10-16" @default.
- W2471917827 title "Step Coalescence by Collective Motion at an Incommensurate Grain Boundary" @default.
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- W2471917827 doi "https://doi.org/10.1103/physrevlett.116.106102" @default.
- W2471917827 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27015493" @default.
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