Surface holography with LEED electrons

The present status of surface holography using low energy electron diffraction intensities is described. It is shown that diffuse intensity distributions appearing with disordered adsorption on a crystalline substrate can be interpreted in a holographic sense by the single adatom acting as a beam splitter for the primary electron beam. We demonstrate that intensities taken at many energies need to enter the reconstruction integral in order to retrieve well resolved atomic images. We also show that the method can be extended to use also discrete superstructure spot intensities instead of diffuse maps, so opening the field to ordered superstructures. The power and applicability of the method is discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.