Dynamical properties of Au adatoms on low index Cu faces by molecular dynamics simulation

摘要

In recent years there is a growing interest in the study of vibrational properties of both clean and adsorbate covered surfaces of metals.~(1-5) For several years two complementary experimental methods have been used to measure the dispersion relations of surface phonons on different crystal faces. These are the scattering of thermal helium beams~2.5 and the high-resolution electron-energy-loss-spectroscopy.~3.6