Grazing incidence Ultrashort pulses 12 Distorted waves 10 Metal surfaces 10 Band structure 8 Emission spectroscopy 8 Photo-electron emission 8 Photoelectrons 8 Photons 8 Atoms 6 Condensed matter physics 6 Density functional theory 6 Diffraction 6 Numerical solution 6 Photoelectron spectroscopy 6 Schrodinger equation 6 Van der Waals forces 6 Band-structure-based models 4 Crystallographic directions 4 Electron emission 4 Fast atom diffractions 4 Interaction potentials 4 Nonlinear equations 4 Structure-based 4 Surface scattering 4 Time dependent Schrodinger equation 4 Van der Waals effect 4 Van der Waals interaction 4 Ab initio 2 Alkali halide surfaces 2