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We present molecular dynamics simulation results concerning the structural and the diffusive properties of small (3-7 atoms) 2D Au clusters on the Cu(111) surface. We found that in the normal to the surface direction the clusters are expanded, while the surface layer is contracted, depending on the cluster size, these relaxations exhibiting power law temperature dependence. The mean-square displacements...
The transport properties of single Au adatoms on low-index Cu surfaces have been studied using molecular dynamics. We found that on the Cu(001) face, the adatom substitutes a surface Cu atom via the exchange diffusion mechanism, while this process is absent on the Cu(111) surface. On the Cu(110) face, hopping and exchange diffusion processes coexist with almost equal probability. The migration energies...
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