Tip-induced adatom extraction and cluster manipulation

摘要: We present results for tip-induced extraction of a Cu adatom from mound on Cu(111), and compare the characteristics to that similar Ag system. Molecular-dynamics molecular static simulations were carried out using interaction potentials embedded atom method. revealed differences in modes cases systems their dependence tip geometry. For case sharp tip, occurs via pulling mode, while with blunt is more complex involving two-step motion. On other hand, relatively stronger Cu-Cu leads sliding and/or dragging mode which whole three-dimensional cluster dragged followed by cluster. Molecular provide detailed analysis changes energy landscape presence resulting substantial decrease barrier an descend mound.