Investigation of the Scattering of Low Energy Electrons from the Surface of Single Crystal Aluminum

[摘要] Elastic and inelastic low energy electron diffraction (ELEED, ILEED) observations have been made on a clean surface of A1(100). Measurements on the (10) and (11) elastic diffraction beams were made using normally incident electrons in the energy range 30 ≤ E ≤ 170 eV. Peaks in the energy lossdistribution are seen near 5, 10, 15, 26 and 31 eV, the dominant peaks near 10 and 15 eV corresponding to surface and bulk plasmon excitations respectively.Two types of structure are observed in the inelastic angular profiles: one closely correlated with the structure in the elastic angular profile, and the second being substructure corresponding to different ILEED conditions. Energy intensity profiles (as a function of incident energy) for the (10) and (11) elastic and inelastic diffraction beams have been measured. These profiles also show primary and secondary structure. Within the substructure of the angular and energy intensity profiles are the first experimental observations of sideband diffraction. A comparison of the experimental results and the theoretical predictions of Duke and Laramore and of Duke and Bagchi is made.

[效力级别] low energy electron diffraction (LEED)

[关键词] electron scattering;low energy electron diffraction (LEED);single crystal aluminum