Evolution of Non-Equilibrium Profile in Adsorbate Layer under Compressive Strain

Details Evolution of Non-Equilibrium Profile in Adsorbate Layer under Compressive Strain Evolution of Non-Equilibrium Profile in Adsorbate Layer under Compressive Strain

2012-04-15

arxiv.org/abs/1204.3285v1

Physics

Condensed Matter

Materials Science

6 pages, 7 figures, Tribology Letters

Scientific paper

10.1007/s11249-012-9950-7

We investigate the time evolution of an initial step profile separating a bare substrate region from the rest of the compressively strained adsorbate layer near a commensurate to incommensurate transition. The rate of profile evolution as a function of the mismatch, coverage and the strength of the substrate potential are determined by Brownian molecular dynamics simulations. We find that the results are qualitatively similar to those observed for the Pb/Si(111) system. The anomalously fast time evolution and sharpness of the non-equilibrium profile can be understood through the domain wall creation at the boundary and its subsequent diffusion into the interior of the adsorbate layer.

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