Inelastic Hydrogen Atom Scattering from Semiconductor Surfaces


Book Description

The adiabatic approximation is widely applied to describe interactions of atoms and molecules with solid surfaces. It assumes that the electronic system stays in the lowest-energy ground state during the interaction and energy is exclusively distributed via lattice vibrations in the solid. However, in case of light hydrogen atoms, it predicts inefficient energy transfer to the atoms of heavier solids, contradicting experimental findings of inelastic H atom scattering from germanium surfaces. Germanium is an elemental semiconductor and, unlike frequently studied metals, does not have partly-...







Theoretical Modelling of Semiconductor Surfaces


Book Description

The state-of-the-art theoretical studies of ground state properties, electronic states and atomic vibrations for bulk semiconductors and their surfaces by the application of the pseudopotential method are discussed. Studies of bulk and surface phonon modes have been extended by the application of the phenomenological bond charge model. The coverage of the material, especially of the rapidly growing and technologically important topics of surface reconstruction and chemisorption, is up-to-date and beyond what is currently available in book form. Although theoretical in nature, the book provides a good deal of discussion of available experimental results. Each chapter provides an adequate list of references, relevant for both theoretical and experimental studies. The presentation is coherent and self-contained, and is aimed at the postgraduate and postdoctoral levels.




Inelastic H-Atom Scattering from Ultra-thin Films


Book Description

This thesis contains experimental and theoretical fundamental studies of energy transfer processes on various surfaces via inelastic hydrogen atom scattering using the Rydberg atom tagging machine. The initial investigations of in total six late transition fcc-metals (Au, Pt, Ag, Pd, Cu, Ni) allowed to establish and optimize the experimental methodology as well as to simultaneously substantiate a theoretical model for the general description of energy-transfer processes on metal surfaces. Hence, it could be determined that the energy transfer for the investigated fcc-metals predominantly ta...