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HL: Fachverband Halbleiterphysik
HL 9: 2D Materials and Heterostructures: Interlayer Excitons
HL 9.12: Vortrag
Montag, 18. März 2024, 18:00–18:15, EW 201
Correlated Magnetism in Moiré Exciton-Polaritons — •Lukas Lackner1, Johannes Scherzer2, Bo Han1, Jens-Christian Drawer1, Christoph Bennenhei1, Martin Esmann1, Alexander Högele2, and Christian Schneider1 — 1Carl von Ossietzky University Oldenburg, Germany — 2Ludwig-Maximilians-Universität München, Germany
Due to the reduced dielectric screening in van der Waals materials, Coulomb interactions and many-body correlations are enhanced. This allows for a large variety of experimentally observables such as Wigner crystals, quantum Hall phases and Hubbard-correlated magnetic phases. In Moiré lattices, due to the periodic potential landscape and thus the reduced kinetic energy of confined quasi-particles, correlations display their fingerprints more prominently. In this work, we present the evolution of a correlation induced magnetic phase of Moiré confined exciton-polaritons based on a charge tunable MoSe2/WS2 van der Waals heterostructure in a spectrally tunable open microcavity. Approaching the Mott state of the triangular Moiré lattice at a filling of one electron per lattice site, Moiré exciton-polartions acquire a giant, nonlinear g-factor reflecting the emergence of correlated magnetism in our electron system.
Keywords: Moiré; Exciton-Polariton; Zeeman; Giant g-factor