Time and energy-resolved two photon-photoemission of the Cu(100) and Cu(111) metal surfaces

TL;DR

This paper presents a computational study of energy- and time-resolved two-photon photoemission spectra on Cu(100) and Cu(111) surfaces, incorporating inelastic effects and potential variations to understand electron dynamics.

Contribution

It introduces a real-space, real-time computational method for simulating two-photon photoemission spectra on metal surfaces, including inelastic scattering and potential variation effects.

Findings

Inelastic scattering rates are effectively incorporated using GW calculations.

Variation of the classical Hartree potential has minimal impact on spectra.

The method provides detailed insights into electron decay mechanisms.

Abstract

We present calculations on energy- and time-resolved two-photon photoemission spectra of images states in Cu(100) and Cu(111) surfaces. The surface is modeled by a 1D effective potential and the states are propagated within a real-space, real-time method. To obtain the energy resolved spectra we employ a geometrical approach based on a subdivision of space into two regions. We treat electronic inelastic effects by taking into account the scattering rates calculated within a GW scheme. To get further insight into the decaying mechanism we have also studied the effect of the variation of the classical Hartree potential during the excitation. This effect turns out to be small.