Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 39: 2D semiconductors VII – CrSBr and related heterostructures
HL 39.7: Talk
Thursday, March 12, 2026, 11:15–11:30, POT/0081
Tracking Magnetic Phase Evolution in CrSBr via Excitonic Emission and Absorption — •Lukas Krelle1, Ryan Tan1, Daria Markina1, Priyanka Mondal1, Kseniia Mosina2, Kevin Hagmann1, Regine von Klitzing1, Zdenek Sofer2, and Bernhard Urbaszek1 — 1Institute for Condensed Matter Physics, TU Darmstadt, Hochschulstraße 6-8, D-64289 Darmstadt, Germany — 2Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
CrSBr is an air-stable magnetic van der Waals semiconductor, in which the interaction of excitons with the magnetic order enables the optical identification of different magnetic phases. Here, we study multi-layer samples of CrSBr inside a three-axis vector magnet and correlate magnetic order and optical transitions. We identify layer by layer switching of the magnetization through drastic changes of the optical absorption energy and strength as a function of the applied magnetic field. We find that ferromagnetic and antiferromagnetic order between layers can coexist in the same domain [1]. The photoluminescence evolution depends on the magnetic order and can differ for each emission. The intensity of energetically lower lying transitions reduces monotonously with increasing field strength whereas energetically higher lying transitions around the bright exciton increase in intensity close to the saturation field. Using this contrasting behavior we can therefore correlate transitions with each other. [1]: L. Krelle et al, ACS Nano 2025, 19, 33156
Keywords: CrSBr; Magnetic Semiconductor; Van der Waals Materials; Excitons; Magneto-Optics