SKM 2021 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 3: Poster Session I
HL 3.12: Poster
Montag, 27. September 2021, 10:00–13:00, P
Polarization resolved photoluminescence study of interlayer excitons in a twisted van-der-Waals heterostructure — •Johannes Michl1, Sergey Tarasenko2, Frederik Lohof3, Christopher Gies3, Martin von Helversen4, Renee Sailus5, Sefaattin Tongay5, Takashi Taniguchi6, Kenji Watanabe6, Tobias Heindel4, Stephan Reitzenstein3, Tatiana Shubina2, Sven Höfling1, Carlos Anton-Solanas1,7, and Christian Schneider7 — 1Technische Physik, Universität Würzburg — 2Ioffe Institute, St. Petersburg — 3Institute for Theoretical Physics, University of Bremen — 4Institute of Solid-State Physics, Technische Universität Berlin — 5Arizona State University — 6National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan — 7Institute of Physics, Carl von Ossietzky University Oldenburg
Two-dimensional monolayers of transition metal dichalcogenides (TMDCs) offer a wide range of possibilities for investigation due to their unique optical properties, resulting from the exotic valley physics and the strong Coulomb interaction. By stacking two different TMDCs with a twist angle, a van der Waals heterostructure is formed that exhibits a spatially periodical Moiré potentials.
We discuss polarization resolved photoluminescence experiments performed on interlayer excitons in a slightly twisted MoSe2/WSe2 heterobilayer. In detail, we focus on the polarization properties of our sample: Our results highlight the observation of a significant degree of circular polarization of excitons, which can be manipulated with an externally applied magnetic field.