Papers › Crystal structure discrimination based on a single atom speed dynamics
Crystal structure discrimination based on a single atom speed dynamics
Rafał Abram, Dariusz Chrobak
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Atom arrangement plays a critical role in determining material properties. It is, therefore, essential for materials science and engineering to identify and characterize distinct atom configurations. Currently, crystal structures can be determined either by its static properties or by quantifying its structural evolution. Here we show how to classify an atom into phase solely by its speed dynamics. We model silicon crystals at different phase transition points and use a single atom speed trajectory to demonstrate that crystal-structure-independent Maxwell distribution of speed is generated by crystal-structure-dependent atom dynamics. As the classification accuracy of the method increases with trajectory length, we show that subtle difference in local atomic structures can be identified using sufficiently long trajectories. Thanks to symbolization of atom dynamics, the method is computationally efficient and suitable for an analysis of large datasets on the fly.
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