Description

The observation of surface phonon using scanning probe microscopy can provide important information related to local structural and electrical properties. In thisstudy, surface phonon modes on a Cu(100) surface were measured using inelastic tunneling spectroscopy of scanning tunneling microscopy. One phonon mode wasmeasured at 3.6 meV on a clean Cu(100) surface. On an oxygen-adsorbed Cu(100) surface, another phonon mode was measured at 13.5 meV. This phonon mode wasconsidered to be enhanced by the symmetry created by Cu-missing rows. The spatially varying d²I/dV² map showed the effect of surface stress relaxation.