Non-stochastic behavior of atomic surface diffusion on Cu(111) at all temperatures

Details Non-stochastic behavior of atomic surface diffusion on Cu(111) at all temperatures Non-stochastic behavior of atomic surface diffusion on Cu(111) at all temperatures

2004-03-22

arxiv.org/abs/cond-mat/0403565v1

Physics

Condensed Matter

Other Condensed Matter

5 figures

Scientific paper

10.1103/PhysRevLett.93.166107

Atomic diffusion is usually understood as a succession of random, independent displacements of an adatom over the surface's potential energy landscape. Nevertheless, an analysis of Molecular Dynamics simulations of self-diffusion on Cu(111) demonstrates the existence of different types of correlations in the atomic jumps at all temperatures. Thus, the atomic displacements cannot be correctly described in terms of a random walk model. This fact has a profound impact on the determination and interpretation of diffusion coefficients.

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