Theory of electronic excitations in coated metal particles: Jellium-on-jellium model

Abstract

Electronic excitations in coated metal particles are investigated within the framework of a self-consistent spherical jellium-on-jellium model (the spherical analog to Lang’s chemisorption model for flat surfaces). With use of the calculated single-electron potential in the ground state, the time-dependent local-density approximation is applied to study the existence of a variety of collective modes such as surface modes, interface modes, and overlayer-volume modes. The results are compared with the Eguiluz’s work, which used the same model to study collective motion in flat metallic overlayers.