دراسة تأثير التغطية الواطئة بالذرات القلوية على عمـلية تبادل الشحنة بين الذرة المستطيرة و الذرة الملتصقة سطح بوجود اقتران إلكترون- فونون

الملخص EN

The Non- Local approximation for the effect of coverag on the charge transfer process in the hyper – thermal energies regime, is one of the most important subject in surface physics .

And to study this effect due to the recoil of the adatom through out the scattering of atom from surface covered with alkali atoms , Anderson Hamiltonian is used which incorporates the interaction of the scattering atom with the adatom and the interaction of the adatom with the surface atoms.

Since the atom is scattered from the adatom and the charge transfer happens through out resonance and quasi-resonance charge transfer.

The Hamiltonian incorporates also the electron-phonon coupling interaction .The system of equations for scattered atom-adatom/ surface is treated using the wide band approximation .

The system of equations are solved numerically using six-order Runge-Kutta method with the accuracy is checked at each time .

The treatment is applied to real system , that is Li-K/W, since the ionization probability of the scattered atom and the position of the atomic energy level with respect to Fermi level are studied as function of surface work function variations.