Atomic Binding of Transition Metals on Clean Single‐Crystal Tungsten Surfaces

摘要: The binding energy of single atoms the Period‐6 transition elements on atomically perfect single‐crystal planes tungsten was measured by utilizing low‐temperature‐pulse field desorption, in a ultrahighvacuum field‐ion microscope. For any given adatom, dependence surface crystallography observed to be inconsistent with pairwise interaction model. A new model incorporating surface‐charge redistribution into potential is shown consistent data. variation electronic configuration adatom interpreted terms an electron‐energy band depends upon electron occupancy two subbands assumed exist d levels atom, when it adsorbed surface. Finally, abnormal field‐desorption properties adatoms (110) plane are discussed its anomalous work function.