Site-Specific Characteristic of the Kikuch-Like Bands in High-Angular-Resolution X-Ray Photoelectron Diffraction

Abstract

Fine-mesh two-dimensional measurements of Ca2p and F1s X-ray photoelectron diffraction (XPED) patterns from a CaF 2 (111) surface were performed with high angular resolution. These measurements revealed a great deal of fine structure including many Kikuchi-like bands and circular patterns. On comparing the Ca2p and F1s XPED patterns, an energy dependence of the Kikuchi-like bands and circular patterns was observed. Furthermore, the Kikuchi-like bands associated with the (111) plane differed substantially between the Ca2p and F1s XPED patterns. This is the first report of the site-specific characteristic of the Kikuchi-like bands in XPED.