Excitons and carriers in transient absorption and time-resolved ARPES spectroscopy: an abinitio approach

TL;DR

This paper introduces an ab initio computational scheme to accurately model transient spectroscopy signals involving excitons, demonstrated on LiF, applicable to various materials for pump-probe experiments.

Contribution

The paper presents a novel, fully ab initio method for simulating transient spectroscopy signals with excitons, enhancing predictive capabilities for material analysis.

Findings

Successfully captures exciton signatures in LiF

Applicable to both time-resolved ARPES and transient absorption

Potential to become a standard modeling approach

Abstract

I present a fully abinitio scheme to model transient spectroscopy signals in presence of strongly bound excitons. Using LiF as a prototype material, I show that the scheme is able to capture the exciton signature both in time-resolved ARPES and transient absorption experiments. The approach is completely general and can become the reference scheme for modelling pump and probe experiment in a wide range of materials.