Investigation of low energy Pt atoms impacts on Pt(111) by molecular dynamics simulation
低能Pt原子与Pt(111)表面相互作用的分子动力学模拟

We have studied the influence of low energy Pt atom impacts on Pt(111) surface by molecular dynamics simulation.Interaction potential with embedded atom method(EAM) was used in the simulation.Adatom yields,sputtering yields,and vacancy yields at various incident energies were calculated.It was found that there is a sputtering threshold energy for the incident energy.When the incident energy is higher than the sputtering threshold,the sputtering yield,adatom yield,and vacancy yield increase with the increase of incident energy,and adatoms mainly come from the first layer of the substrate.The sputtering pattern and adatom distribution present 3 fold symmetry as well.The dependence of the adatom yield,vacancy yield and sputtering yield on the incident energy and the relative atomistic mechanisms are discussed.