The Electric Field effects on the charge state and the Potential Energy Surfaces of the systemNa/Ni (110)

Distance and screening effects on the adatom’s effective charge are studied within the framework of the time – dependent Anderson – Newns model throughout the chemisorption theory. An analytical formula for the effective charges is used and developed where the repulsion of the two electrons of opposite spins in the adatom is taken into account by means of the correlation energy. An analytical formulation for the metallic chemisorption energy [1] is also used and developed while the ionic contribution to the chemisorption energy is solved numerically. The chemisorption energies are calculated as a function of distance, screening length and applied electric field. The comparison with the behavior of the experimental data gives good agreement.