Dresden 2026 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 39: 2D semiconductors VII – CrSBr and related heterostructures
HL 39.9: Vortrag
Donnerstag, 12. März 2026, 11:45–12:00, POT/0081
Preparation and characterization of CrSBr on opal substrtates — •Jannik Schürmann1, Aleksandra Lopion1, Ursula Wurstbauer1, Alexey V. Scherbakov2, and Giulia Magnabosco3 — 1University of Münster, Münster, Germany — 2Technische Universität Dortmund, Dortmund, Germany — 3Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Ger- many
The magnetic semiconductor Chromium-Sulfur-Bromide (CrSBr) is a highly anistropic van der Waals material. To study the anisotropy of the phononic properties independent from the supporting substrate, the flakes can be detached from it either by suspending it over cavities or by transferring it to a substrate containing closely packed silica spheres (opals). This second approach was already applied to other, nonmagnetic vdW materials such as WSe2 allowing an in-depth pump-probe study of phonons in the material [1]. Accordingly, we transfer mechanically exfoliated CrSBr onto opal substrates using polycarbonate stamps (dry transfer) and thoroughly characterize the properties and qualities of the flakes on opals. Atomic force microscopy confirms that CrSBr is on top of the spheres and partially freestanding. PL and Raman measurements are performed to validate the behavior of the flake in comparison with fully supported one. The decoupled CrSBr flakes on opal substrates are suitable for pump-probe studies of phonon states in CrSBr.
[1] A. Carr et al, ACS Photonics, 11, 1147-1155 (2024) .
Keywords: CrSBr; magnetic semiconductor; transfer