THEORY OF ELECTRON MULTIPLE-SCATTERING

A technique to calculate the T matrix exactly for N scatterers from the individual T matrices in the elastic-electron-scattering process is developed based on the multicenter-expansion method. A summing formula for the sets of T matrices is also derived to handle large systems without an accumulation of significant error. Furthermore, it is applied to the study of multiple scattering of a photoelectron and electron scattering by an adsorbate on solid surface.