SKM 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 3: Poster Session I
HL 3.20: Poster
Montag, 27. September 2021, 10:00–13:00, P
Proximity control of interlayer exciton-phonon hybridization in van der Waals heterostructures — •Marlene Liebich1, Philipp Merkl1, Chaw-Keong Yong1, Isabella Hofmeister1, Gunnar Berghaeuser2,3, Ermin Malic2,3, and Rupert Huber1 — 1Department of Physics, University of Regensburg, 93040 Regensburg, Germany — 2Department of Physics, Philipps-Universitaet Marburg, 35037 Marburg, Germany — 3Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
Van der Waals stacking has provided unprecedented flexibility in shaping many-body interactions by controlling electronic quantum confinement, orbital overlap and electron-phonon coupling. We introduce proximity-controlled strong-coupling between Coulomb correlations and lattice dynamics in neighbouring van der Waals materials, creating new electrically neutral hybrid eigenmodes, called excitonic Lyman polarons. Specifically, we explore how the internal orbital 1s–2p transition of Coulomb-bound electron-hole pairs in monolayer tungsten diselenide resonantly hybridizes with lattice vibrations of a polar capping layer of gypsum. Tuning orbital exciton resonances across the vibrational resonances, we observe distinct anticrossing and polarons with adjustable exciton and phonon compositions. Such proximity-induced hybridization can be further tailored by shaping the spatial wavefunction overlap of excitons and phonons, providing a promising new route towards engineering novel ground states of two-dimensional systems.