Attosecond streaking of core lines of copper dihalides

TL;DR

This paper theoretically predicts a measurable attosecond-scale emission time delay between satellite and main lines in copper dihalides, revealing electron correlation effects and core-hole screening differences.

Contribution

It introduces a novel theoretical prediction of emission time delays in core-level photoemission due to electron correlation in copper dihalides.

Findings

Satellite emission occurs later than main line by attoseconds.

Time delay relates to electron correlation and core-hole screening.

Delay quantifies extrinsic loss in photoemission.

Abstract

In the attosecond (as) streaking of Cu 3s core-level photoemission of copper dihalides, we predict theoretically that the satellite ($3d^9$) is emitted later than the main line ($3d^{10}L^{-1}$; $L$: ligand). The emission time delay is originated from the electron correlation between the core level and 3d shell, which leads to the difference in core-hole screening between satellite and main lines. Further, we find that the time delay corresponds to a quantification of the extrinsic loss of photoemission.