The impact of electron-electron correlation in ultrafast attosecond single ionization dynamics

• URL: http://arxiv.org/abs/2002.11633v1
• Date: Tue, 25 Feb 2020 16:00:20 GMT
• Title: The impact of electron-electron correlation in ultrafast attosecond single ionization dynamics
• Authors: Friedrich Georg Fr\"obel (1 and 2), Karl Michael Ziems (1 and 3), Ulf Peschel (2 and 4), Stefanie Gr\"afe (1,2 and 3) and Alexander Schubert (1) ((1) Institute of Physical Chemistry, Friedrich Schiller University Jena, Germany. (2) Abbe Center of Photonics, Friedrich Schiller University Jena, Germany. (3) Max Planck School of Photonics, Jena, Germany. (4) Institute for Condensed Matter Theory and Solid State Optics, Friedrich Schiller University Jena, Germany.)
• Abstract summary: We investigate the attosecond ultrafast ionization dynamics of correlated two- or many-electron systems. We find that different pathways result in a difference in the electronic population of the parent molecular ion.
• Score: 38.98439939494304
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The attosecond ultrafast ionization dynamics of correlated two- or many-electron systems have, so far, been mainly addressed investigating atomic systems. In the case of single ionization, it is well known that electron-electron correlation modifies the ionization dynamics and observables beyond the single active electron picture, resulting in effects such as the Auger effect or shake-up/down and knock-up/down processes. Here, we extend these works by investigating the attosecond ionization of a molecular system involving correlated two-electron dynamics, as well as non-adiabatic nuclear dynamics. Employing a charge-transfer molecular model system with two differently bound electrons, a strongly and a weakly bound electron, we distinguish different pathways leading to ionization, be it direct ionization or ionization involving elastic and inelastic electron scattering processes. We find that different pathways result in a difference in the electronic population of the parent molecular ion, which, in turn, involves different subsequent (non-adiabatic) postionization dynamics on different time scales.

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