LAUSR

Abstract Specularity of the scattering of conduction electrons at the W(001) surface covered with an ordered deuterium (D) monolayer is shown to be higher than that for the clean W ( 001 ) − ( 2 × 2 ) R 4 5 o reconstructed surface. In the course of experiments, we measured changes in the transversal magnetoresistance induced by adsorption and ordering the D submonolayers on a thin W(001) plate. The obtained experimental data have been compared with Fermi contours of surface electronic states (SES) calculated for both the clean reconstructed W(001) surface and that covered with the D-monolayer. It has been found that transformations of the surface electronic structure, induced by the ordered monolayer of adsorbed D, lead to an almost twice decrease in the probability of electronic transitions between the surface and bulk electronic states. This effect has been assumed to be the reason for the considerable increase in specularity of the surface scattering of conduction electrons.