HREELS studies of surface phonons on palladium(100) and silver(111)

e have investigated surface phonons on Ag(111) and Pd(100) surfaces using high-resolution electron energy loss spectroscopy. A detailed knowledge of surface phonons is essential for a microscopic description of surface atomic structure, phase transition, surface transport properties and desorption processes. By comparing the measured data with theoretical models through the analysis of phonon dispersions and scattering cross sections, we can obtain the information about surface structural and dynamical properties.;For the Pd(100) surface, the dispersions of the Rayleigh wave along the ;For the Ag(111) surface, three phonon modes have been measured in the...