Surface structure determinations of crystalline ionic thin films grown ontransition metal single crystal surfaces by low energy electron diffraction

摘要

The surface structures of NaCl(100), LiF(100) and alpha-MgCl2(0001) adsorbed onvarious metal single crystals have been determined by low energy electron diffraction (LEED). Thin films of these salts were grown on metal substrates by exposing the heated metal surface to a molecular flux of salt emitted from a Knudsen cell. This method of investigating thin films of insulators (ionic salts) on a conducting substrate (metal) circumvents surface charging problems that plagued bulk studies, thereby allowing the use of electron-based techniques to characterize the surface.