NONADIABATIC EFFECTS IN CHARGE-TRANSFER CAUSED BY ELECTRON CORRELATION

Using a recently developed many-electron theory, we investigate the ve locity dependence of charge transfer probabilities in atom-surface sca ttering. By analysis of the instantaneous spectral function of the ato mic levels, the microscopic origins of non-adiabaticity can be determi ned. We show that, under certain conditions, intra-atomic correlation effects can introduce novel and non-trivial sources of non-adiabaticit y, due to the formation of the Kondo resonance near the Fermi level of the substrate. The narrow width of the Kondo resonance introduces an additional long time scale, which persists even at low velocities.