Photoemission spectroscopy from the three-body Green's function
ORAL
Abstract
We present an original approach for the calculation of direct and inverse photo-emission spectra from first principles.
Our method uses the three-body Green's function as a key quantity instead of the one-body Green's function as is traditionally done.
We show that, contrary to the one-body Green's function, satellites are already present in the corresponding non-interacting Green's function.
Therefore, quasiparticles and satellites are treated on an equal footing in our approach.
Moreover, we propose a simple static three-body self-energy that can be applied in practical calculations on real systems since it requires standard numerical tools readily available in all computer codes.
Our method uses the three-body Green's function as a key quantity instead of the one-body Green's function as is traditionally done.
We show that, contrary to the one-body Green's function, satellites are already present in the corresponding non-interacting Green's function.
Therefore, quasiparticles and satellites are treated on an equal footing in our approach.
Moreover, we propose a simple static three-body self-energy that can be applied in practical calculations on real systems since it requires standard numerical tools readily available in all computer codes.
*We thank the French Agence Nationale de la Recherche (ANR) for financial support (Grant Agreements No. ANR-18-CE30- 0025 and ANR-19-CE30-0011).
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Publication: G. Rival, P. Romaniello, and J.A. Berger, SciPost Phys. 12, 093 (2022)
Presenters
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Arjan A Berger
- Univ Paul Sabatier