HOLOGRAPHY WITH CONVENTIONAL LEED

A recently published interpretation of diffuse LEED patterns as electron holograms as well as the subsequent reconstruction of real-space images is extended to use conventional LEED spot intensities. The procedure is based on the fact that ordered adsorbates produce superstructure spots which sample the diffuse intensity distribution appearing in the case of disordered adsorption. This circumvents experimental difficulties in measuring diffuse (i. e. low-level) intensities, particularly at higher energies. It also opens up the application of electron holography to ordered structures. Using experimental data we show that laterally resolved images can be reconstructed from the spot intensities. However, atomic positions can be displaced and vertical cut images are of insufficient quality.