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eeri ati form 13 ion ion cem ltip s gi change in the twinning and/or dislocation motion. Dislocation nucleations occurred inside the material near the top of the surface and generated properties of materials and thin films [1–6]. simulations are too expensive, limiting the maximum indenta-scale process and understanding of their mechanisms. Landman Applied Surface Science 253et al. [9] found two different phenomena took place in their Ni tip/Au substrate model during the indentation and retraction processes. One is the jump-to-contact caused by mechanical instabilities in the nanoindentation phase. The other is th