[Th-A2-B] Novel optoelectrical phenomena in 2D materials

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[Th-A2-B-02] Electrical Tuning of Excitons and Trions in MoS₂/Graphene van der Waals heterostructures

〇Omid Ghaebi¹, Tarlan Hamzayev¹, Till Weickhardt¹, Muhammad Sufyan Ramzan², Takashi Taniguchi³, Kenji Watanabe⁴, Caterina Cocchi², Domenico De Fazio⁵, Giancarlo Soavi^1,6 (1. Inst. of Solid State Physics, Friedrich Schiller Univ. Jena, Jena (Germany), 2. Inst. for Condensed Matter Theory and Optics, Friedrich Schiller Univ. Jena, Jena (Germany), 3. Res. Center for Materials Nanoarchitectonics, National Inst. for Materials Sci., Tsukuba (Japan), 4. Res. Center for Electronic and Optical Materials, National Inst. for Materials Sci., Tsukuba (Japan), 5. Department of Molecular Sciences and Nanosystems, Ca’ Foscari Univ. of Venice, Venice (Italy), 6. Abbe Center of Photonics, Friedrich Schiller Univ. Jena, Jena (Germany))

We investigate gate- and power-dependent photoluminescence of A and B excitons and trions in monolayer MoS₂ and MoS₂/graphene heterostructures. Electrical doping and interlayer charge transfer strongly modify exciton emission, revealing distinct exciton dynamics in pristine MoS₂ and MoS₂/graphene heterostructure.