Spectrum of electronic excitations due to the adsorption of atoms on metal surfaces

TL;DR

This paper develops a time-dependent mean-field model to analyze electronic excitations caused by atom adsorption on metal surfaces, providing insights into the dynamic electronic structure during adsorption.

Contribution

It introduces a novel time-dependent approach to study electronic excitations in adsorbate-metal systems using the Newns-Anderson model in the wide-band limit.

Findings

Derived equations for the time evolution of electronic structure.

Calculated the spectrum of electronic excitations.

Demonstrated model behavior with realistic parameters.

Abstract

The time-dependent, mean-field Newns-Anderson model for a spin-polarised adsorbate approaching a metallic surface is solved in the wide-band limit. Equations for the time-evolution of the electronic structure of the adsorbate-metal system are derived and the spectrum of electronic excitations is found. The behaviour of the model is demonstrated for a set of physically reasonable parameters.