Attosecond structures from the molecular cavity in fullerene photoemission time delay

Abstract

Photoelectron spectroscopy studies earlier probed oscillations in C 60 valence emissions, producing a series of minima whose energy separation depends on the molecular cavity. We show here that the quantum phase at these cavity minima exhibits variations from strong electron correlations in C 60 , causing rich structures in the emission time delay. Hence, these minima offer unique spectral zones to directly explore multielectron forces via attosecond RABITT interferometry not only in fullerenes, but also in clusters and nanostructures for which such minima are likely abundant.

Attosecond time delay in valence photoionization and photorecombination of argon: A time-dependent local-density-approximation study

“…Our study highlights the importance of the second dipole-allowed channel at energies near the Cooper minimum of a given channel with the same initial orbital and, in general, stresses the applicability of the TDLDA method to interpret RABITT measurements. Results also add reliability to recent TDLDA predictions [19,34,35] of the PI time delay in fullerene materials. This paper is structured as follows.…”

Attosecond time delays in the valence photoionization of xenon and iodine at energies degenerate with core emissions

“…In contrast, an opposite temporal trend is displayed near the CM region where the delays appear positive. This slower emergence near CM dovetails with the time-behavior earlier seen in the Ar emission near a spectral minimum [2]. Also note that for Xe our result closely agrees with the streaking measurement for the delay of 4d relative to 5s [4].…”

“…We compute these quantum phases and resulting WS delays in the photoionization of valence electrons of Xe and I atoms, using a scheme of time-dependent local density approximation (TDLDA) [2]. Analysis of the results with the goal to temporally access details of electron correlations has been carried out.…”

Density functional study of the variants of inter-Coulombic decay resonances in the photoionization of Cl@C60

“…which is solved self-consistently in a mean-field framework. The requirement of charge neutrality produced ∆ = 1.3 Å, in agreement with the value inferred from experiment [31,32]. Linear-response time-dependent density functional theory (LR-TDDFT) is employed to simulate the dynamical response of C 60 to incident photons [33].…”