タングステン清浄表面上の遷移金属原子の結合エネルギーの決定

抄録

The binding energy of individual adatoms of 5-d transition metals on different planes of a tungsten single-crystal was measured by the low-temperature field desorption method with a field-ion microscope. Effective field correction of work functions, determined from the FowlerNordheim plots, lead to agreement with the work functions obtained by the Kelvin method. Binding energies determined by the use of the compensated work functions, the effective desorption field and the appropriate field desorption formulated to reasonable results. The increasing order of the binding energies of adatoms on different planes, namely, (110)<(100)<(112)<(111) agreed well with the energetics estimated from the Morse potential curve and the hard sphere model on crystal planes.