EFFECT OF CORRELATED HOPPING ON CHARGE-TRANSFER IN ATOM SCATTERING ONMETAL-SURFACES

The effect of correlated hopping on the charge transfer in atom-surfac e scattering is studied with use of the time-dependent generalized And erson-Newns model within the equation of motion method. The calculatio ns of the charge state of the scattered atoms are performed for a simp le time dependence of the parameters entering the model within the wid e band approximation. A considerable reduction of the expectation valu es of the negative charge state of scattered atoms for increasing stre ngth of correlated hopping is observed. In comparison with results obt ained within the standard Anderson-Newns model, the time oscillations of these expectation values are enhanced and the equilibrium value is achieved at longer time intervals.