Regensburg 2022 – scientific programme
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DS: Fachverband Dünne Schichten
DS 24: 2D Materials 9 (joint session HL/CPP/DS)
DS 24.4: Talk
Thursday, September 8, 2022, 12:00–12:15, H36
Large perpendicular field in bilayer TMD via hybrid molecular gating — •Sviatoslav Kovalchuk1, Abhijeet Kumar1, Simon Pessel1, Kyrylo Greben1, Dominik Christiansen2, Malte Selig2, Andreas Knorr2, and Kirill Bolotin1 — 1Department of Physics, Quantum Nanoelectronics of 2D Materials, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
We consider structures in which bilayer TMDs are sandwiched between a layer of molecules and Si gate. We show that these structure allow increasing, by a factor of 2, maximum electric field achievable in this 2D material. This in turn, allows reaching electric field >0.2 V/nm. In MOS2 this is sufficient to bring interlayer excitons IX into resonance with either A or B intralayer excitons. We study coupling between these excitons, and give an outlook on the new technique to achieve large perpendicular electric fields detectable in optical measurements.