Dresden 2026 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 3: 2D Materials I – Excitonic properties
HL 3.8: Vortrag
Montag, 9. März 2026, 11:30–11:45, POT/0081
Investigation of dynamics and character of excitons in WSe2 and MoSe2 multilayers — •Anna Weindl1, Matthias Brem1, Jennifer Lehner1, Kenji Watanabe2, Takashi Taniguchi3, and Christian Schüller1 — 1Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93053 Regensburg — 2Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki 305-0044, Japan — 3International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba Ibaraki 305-0044, Japan
We report about our time-resolved Faraday ellipticity (TRFE) experiments on multilayers of the transition metal dichalcogenide WSe2 and MoSe2. In a continuation of our recent work by Raiber et al. [1], we aim to investigate the nature of the pseudospin oscillations that appear in the TRFE signal when we apply an in-plane magnetic field to our multilayer samples. Now we try to characterize and manipulate these oscillations by playing with different experimental parameters. Varying the angle of the magnetic field, adding an electric field or investigating the layer dependence are examples for our toolbox of parameters to gain further insights into the dynamics of the multilayers. The current results, for example on the resonance behavior of the oscillations and the layer-dependent starting point of the oscillations, will be presented.
[1] S. Raiber et al., Ultrafast pseudospin quantum beats in multilayer WSe2 and MoSe2, Nat. Commun. 13, 4997 (2022).
Keywords: Time-resolved Faraday spectroscopy; Multilayers; Quantum beats; TMDC; in-plane magentic field