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Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 31: 2D Materials 5 (joint session HL/CPP/DS)

HL 31.4: Vortrag

Donnerstag, 8. September 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 Bolotin11Department 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.

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