Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 98: Ultrafast electron dynamics at surface and interfaces IV

O 98.1: Hauptvortrag

Freitag, 13. März 2026, 09:30–10:00, TRE/MATH

Electron-phonon interactions in the time domain: from non-equilibrium phonon dynamics to theoretical spectroscopy — •Fabio Caruso — University of Kiel, Germany

First-principles simulations of electron-phonon interactions (EPI) are key to clarifying the microscopic origin of the ultrafast electron and phonon dynamics revealed by pump-probe experiments in crystalline solids [1]. In this talk, I will discuss recent advances in ab-initio simulations of the EPI and their application to light-driven electron and lattice dynamics. Building on recent progress in many-body theory and software, predictive atomistic simulations of complex non-equilibrium phenomena have now become feasible. I will highlight, in particular, non-thermal phonon populations [2], coherent phonons [3], and ultrafast polaron formation as representative examples. This progress forms the basis for a strong synergy between ab-initio theory and experimental ultrafast science.

[1] F. Caruso et al., J. Phys. Mater. 9, 012501 (2025).

[2] Y. Pan et al., ACS Nano 19, 11381 (2025).

[3] C. Emeis et al., Phys. Rev. X 15, 021039 (2025).

Keywords: Ultrafast dynamics; Electron-phonon interactions; Ab-initio simulations; Coherent phonons; Polarons