Inversion symmetry breaking combined with strong spin-orbit coupling in transition metal dichalcogenides such as MoS2 offers important opportunities for spintronics. We investigate excitons in MoS2 monolayers in an applied in-plane electric field. Tight-binding and Bethe-Salpeter equation calculations predict a large quadratic Stark shift. The scaling of the Stark shifts with the exciton binding energy and the dielectric environment provides a path to engineering the MoS2 electro-optical response. Our results suggest that the excitonic Stark effect can be observed experimentally in a MoS2 monolayer and we explain its implications for spintronic devices.
Benedikt Scharf, Tobias Frank, Martin Gmitra, Jaroslav Fabian, Igor Zutic, and Vasili Perebeinos, "Many-body and stark effects in transition metal dichalcogenides monolayers
(Conference Presentation)," Proc. SPIE 9931, Spintronics IX, 99313E (Presented at SPIE Nanoscience + Engineering: August 31, 2016; Published: 4 November 2016); https://doi.org/10.1117/12.2237912.5167075265001.
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