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Resonant electron transfer in ion/atom-metal surface interactions

100%

Taranko E. , Taranko R.

tom Vol. 31, No. 3/4

376-380

The time-dependet Anderson-Newns Hamiltonian with the correlated hopping terms included is used to the description of the charge transfer in ion/atom-surface scattering. The calculations are performed within the equation of motion method using a special trucation procedure. The results generalize the known solutions obtained within the Hartree-Fock approximation. A considerable reduction of the expected electron occupancy of the scattered atoms for increasing strenght of the correlated hopping was obtained for parameters (∈F - ∈A≥ U/2 characterizing the considered system.

Non-adiabatic effects in atom scattering on surfaces

80%

Wiertel M. , Taranko E. , Taranko R.

Electron Technology

2000

tom Vol. 33, No. 3

323-328

The electron occupation numbers of an atom scattered on metal surfaces within time-dependent Newns-Anderson model augmented with the correlated hopping terms are calculated. The many-body interactions are taken into account within mean-field treatment. Non-adiabatic effects in the resonant charge transfer for different values of atomic levels, work functions and atom velocities are discussed.

Influence of adsorbed atoms on the charge transfer in atom/ionsurface collision

80%

Wiertel M. , Taranko E. , Taranko R.

tom Vol. 32, nr 3

301-305

The ionization probability of an atom scattered on the atom adsorbed on a metal surface has been studied theoretically within the time-dependent Anderson–Newns model and the time-evolution operator technique. The influence of different parameters describing the investigated system on the dynamics of the charge transfer between the moving atom and the metal surface with an adsorbed atom has been investigated and the comparison with the results obtained for scattering on a clean metal surface has been made.