2023/08/02 by Tobias Held, Held, Tobias, Sebastian T. Weber +3
Engineering · #Advanced Materials Characterization Techniques #FOS: Physical sciences #Ion-surface interactions and analysis #Laser Material Processing Techniques #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.2308.01067
openalex publication_date 2023/08/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Electron-phonon coupling is a fundamental process that governs the energy relaxation dynamics of solids excited by ultrafast laser pulses. It has been found to strongly depend on electron temperature as well as on nonequilibrium effects. Recently, the effect of occupational nonequilibrium in noble metals, which outlasts the fully kinetic stage, has come into increased focus. In this work, we investigate the influence of nonequilibrium density distributions in gold on the electron-phonon coupling. We find a large effect on the coupling parameter which describes the energy exchange between the two subsystems. Our results challenge the conventional view that electron temperature alone is a sufficient predictor of electron-phonon coupling.