Fast diffusion of a Lennard-Jones cluster on a crystalline surface

Details Fast diffusion of a Lennard-Jones cluster on a crystalline surface Fast diffusion of a Lennard-Jones cluster on a crystalline surface

1997-03-20

arxiv.org/abs/cond-mat/9703181v1

Physics

Condensed Matter

Materials Science

latex, 5 pages with figures

Scientific paper

10.1103/PhysRevLett.78.4597

We present a Molecular Dynamics study of large Lennard-Jones clusters evolving on a crystalline surface. The static and the dynamic properties of the cluster are described. We find that large clusters can diffuse rapidly, as experimentally observed. The role of the mismatch between the lattice parameters of the cluster and the substrate is emphasized to explain the diffusion of the cluster. This diffusion can be described as a Brownian motion induced by the vibrationnal coupling to the substrate, a mechanism that has not been previously considered for cluster diffusion.

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