Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 72: 2D Materials 3: hBN and Electronic Structure
O 72.3: Vortrag
Donnerstag, 8. September 2022, 15:30–15:45, S052
Excitons in two-dimensional magnetic semiconductors — •Marie-Christin Heißenbüttel, Thorsten Deilmann, Peter Krüger, and Michael Rohlfing — Institute of Solid State Theory, University of Münster, Germany
Semiconducting two-dimensional magnets exhibit peculiar interrelation between magnetic properties and light-matter interaction. We will present and discuss ab-initio GW/Bethe-Salpeter equation calculations to examine excitonic states in different magnetic systems.
Due to the hexagonal crystal structure the out-of-plane ferromagnetic monolayer CrI3 came to the fore for the construction of heterobilayers with transition-metal dichalcogenides [1]. Due to coupling effects the magnetic properties are transferred and can be observed in a splitting and a modified Zeeman effect of the excitons. On the other hand, CrSBr shows in-plane magnetization in combination with a large crystal anisotropy. This is reflected in the quasi-1D behavior of different opto-electronic properties [2].
[1] Nano Lett. Lett. 21, 5173-5178 (2021)
[2] https://arxiv.org/abs/2205.13456