Tracking the mid-infrared fine structure of quasi-1D excitons controlled by magnetic order
Liebich M, Florian M, Nilforoushan N, Mooshammer F, Mosina K, Sofer Z, Dirnberger F, Kira M, Huber R, Mooshammer F (2024)
Publication Type: Conference contribution
Publication year: 2024
Publisher: IEEE Computer Society
Conference Proceedings Title: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Event location: Perth, WA
ISBN: 9798350370324
DOI: 10.1109/IRMMW-THz60956.2024.10697739
Abstract
We use phase-locked few-cycle mid-infrared pulses to probe internal Rydberg-like transitions of quasi-one-dimensional excitons in the magnetic semiconductor CrSBr. The experimentally observed fine structure encompasses a lifted degeneracy of the 2p states induced by the anisotropic optoelectronic properties of the crystal. Furthermore, the Coulomb correlations are effectively controlled via the magnetic structure. By inducing a phase transition from antiferromagnetic to paramagnetic states either thermally or by applying an external magnetic field, we can switch excitons from strongly bound and mono-layer-localized to weakly bound and interlayer-delocalized species. A state-of-the-art many-body theory fully captures these findings and identifies the spin restrictions of the interlayer tunneling. In the paramagnetic phase, the reduced quantum confinement lowers the binding energy and increases the phase space for scattering. This in situ control of Coulomb correlations opens a path to shape phase transitions on demand.
Authors with CRIS profile
Involved external institutions
Universität Regensburg
Germany (DE)
University of Michigan
United States (USA) (US)
University of Chemistry and Technology (UCT) / Vysoká škola chemicko-technologická (VŠCHT)
Czech Republic (CZ)
Technische Universität Dresden
Germany (DE)
Germany (DE)
University of Michigan
United States (USA) (US)
University of Chemistry and Technology (UCT) / Vysoká škola chemicko-technologická (VŠCHT)
Czech Republic (CZ)
Technische Universität Dresden
Germany (DE)
How to cite
APA:
Liebich, M., Florian, M., Nilforoushan, N., Mooshammer, F., Mosina, K., Sofer, Z.,... Mooshammer, F. (2024). Tracking the mid-infrared fine structure of quasi-1D excitons controlled by magnetic order. In International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. Perth, WA, AU: IEEE Computer Society.
MLA:
Liebich, M., et al. "Tracking the mid-infrared fine structure of quasi-1D excitons controlled by magnetic order." Proceedings of the 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024, Perth, WA IEEE Computer Society, 2024.
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