Atomistic Study of Structural Correlations at a Liquid-Solid Interface

Details Atomistic Study of Structural Correlations at a Liquid-Solid Interface Atomistic Study of Structural Correlations at a Liquid-Solid Interface

2001-12-30

arxiv.org/abs/cond-mat/0112492v1

Physics

Condensed Matter

Materials Science

22 Pages, including 9 figures

Scientific paper

Structural correlations at a liquid-solid interface were explored with molecular dynamics simulations of a model aluminium system using the Ercolessi-Adams potential and up to 4320 atoms. Substrate atoms were pinned to their equilibrium crystalline positions while liquid atoms were free to move. The density profile at the interface was investigated for different substrate crystallographic orientations and temperatures. An exponential decay of the density profile was observed, $\rho (z) \sim \rm{e}^{- \kappa z}$, leading to the definition of $\kappa$ as a quantitative measure of the ordering at the liquid solid interface. A direct correlation between the amount of ordering in the liquid phase and the underlying substrate orientation was found.

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