Regensburg 2022 – scientific programme
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DS: Fachverband Dünne Schichten
DS 20: Poster
DS 20.27: Poster
Wednesday, September 7, 2022, 16:00–18:00, P3
Valley depolarization of excitons in encapsulated MoSe2-WSe2 heterostructures with controlled moiré potentials — •Andreas Beer1, Anna Weindl1, Niclas Maier1, Antony George2, Andrey Turchanin2, and Christian Schüller1 — 1Universität Regensburg — 2Friedrich-Schiller-Universität Jena
Our focus is the investigation of the temporal and spatial dynamics of interlayer excitons in MoSe2-WSe2 heterostructures with well-defined moiré potentials, based on CVD grown samples. The so called hot pickup method enables us to fabricate such heterostructures out of CVD grown triangulars in a controlled, dry, PDMS-free and easy way.
To understand the valley depolarization mechanism in TMDC monolayers and heterostructures we perform time resolved pump probe measurement. First measurements on twisted TMDC exfoliated heterostructures reveal twist-angle-dependent decay times of the interlayer exciton.