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Uncovering the effects of interface-induced ordering of liquid on crystal growth using machine learning

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  • Rodrigo Freitas

    (Stanford University)

  • Evan J. Reed

    (Stanford University)

Abstract

The process of crystallization is often understood in terms of the fundamental microstructural elements of the crystallite being formed, such as surface orientation or the presence of defects. Considerably less is known about the role of the liquid structure on the kinetics of crystal growth. Here atomistic simulations and machine learning methods are employed together to demonstrate that the liquid adjacent to solid-liquid interfaces presents significant structural ordering, which effectively reduces the mobility of atoms and slows down the crystallization kinetics. Through detailed studies of silicon and copper we discover that the extent to which liquid mobility is affected by interface-induced ordering (IIO) varies greatly with the degree of ordering and nature of the adjacent interface. Physical mechanisms behind the IIO anisotropy are explained and it is demonstrated that incorporation of this effect on a physically-motivated crystal growth model enables the quantitative prediction of the growth rate temperature dependence.

Suggested Citation

  • Rodrigo Freitas & Evan J. Reed, 2020. "Uncovering the effects of interface-induced ordering of liquid on crystal growth using machine learning," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16892-4
    DOI: 10.1038/s41467-020-16892-4
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    Cited by:

    1. Thomas J. Hardin & Michael Chandross & Rahul Meena & Spencer Fajardo & Dimitris Giovanis & Ioannis Kevrekidis & Michael L. Falk & Michael D. Shields, 2024. "Revealing the hidden structure of disordered materials by parameterizing their local structural manifold," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Rodrigues de Assis Elias, Danilo & Granato, Enzo & de Koning, Maurice, 2022. "Global exploration of phase behavior in frustrated Ising models using unsupervised learning techniques," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 589(C).

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