Experimental Study of Inelastic Process at the Crystal Surface in Angle Resolved Low-Energy Electron Energy Loss Spectroscopy

概要

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Angle-intensity profiles of inelastically scattered electrons were measuredaround several diffraction spots for the energy loss less than 20 eV. Peak structureswere observed near diffraction spots. The energy loss dependence and the incidentenergy dependence of the peak position are discussed on the basis of the twostep inelastic diffraction model, which suggests three characteristics in electronenergy loss processes at a surface: (1) maximum probability of surface electronicexcitation occurs at the momentum transfer parallel to the surface, (2) peaks due toloss before diffraction process dominate for grazing incidence and (3) a part ofinelastic electrons due to surface electronic excitations have coherency as well asthe incident electron according to the spot-like distribution of inelastic electrons.
社団法人日本物理学会の論文
1985-01-15