Disentangling the multiorbital contributions of excitons by photoemission exciton tomography
2024 | journal article. A publication with affiliation to the University of Göttingen.
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Disentangling the multiorbital contributions of excitons by photoemission exciton tomography
Bennecke, W.; Windischbacher, A.; Schmitt, D.; Bange, J. P.; Hemm, R.; Kern, C. S. & D`Avino, G. et al. (2024)
Nature Communications, 15(1) art. 1804. DOI: https://doi.org/10.1038/s41467-024-45973-x
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Details
- Authors
- Bennecke, Wiebke; Windischbacher, Andreas; Schmitt, David; Bange, Jan Philipp; Hemm, Ralf; Kern, Christian S.; D`Avino, Gabriele; Blase, Xavier; Steil, Daniel ; Steil, Sabine; Aeschlimann, Martin; Stadtmueller, Benjamin; Reutzel, Marcel ; Puschnig, Peter; Jansen, G. S. Matthijs ; Mathias, Stefan
- Abstract
- Excitons are realizations of a correlated many-particle wave function, specifically consisting of electrons and holes in an entangled state. Excitons occur widely in semiconductors and are dominant excitations in semiconducting organic and low-dimensional quantum materials. To efficiently harness the strong optical response and high tuneability of excitons in optoelectronics and in energy-transformation processes, access to the full wavefunction of the entangled state is critical, but has so far not been feasible. Here, we show how time-resolved photoemission momentum microscopy can be used to gain access to the entangled wavefunction and to unravel the exciton’s multiorbital electron and hole contributions. For the prototypical organic semiconductor buckminsterfullerene (C60), we exemplify the capabilities of exciton tomography and achieve unprecedented access to key properties of the entangled exciton state including localization, charge-transfer character, and ultrafast exciton formation and relaxation dynamics.
- Issue Date
- 2024
- Journal
- Nature Communications
- Project
- SFB 1456: Mathematik des Experiments: Die Herausforderung indirekter Messungen in den Naturwissenschaften
SFB 1456 | Cluster B | B01: Mathematics of atomic orbital tomography - Organization
- I. Physikalisches Institut - Tieftemperaturphysik
- Working Group
- RG Mathias (Ultrafast Dynamics)
- eISSN
- 2041-1723
- Language
- English
- Sponsor
- Alexander von Humboldt-Stiftung http://dx.doi.org/10.13039/100005156
Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
Austrian Science Fund http://dx.doi.org/10.13039/501100002428