Interlayer Excitons in Transition Metal Dichalcogenides Heterostructures

Invited

Abstract

In van der Waals heterostructures formed by stacking two monolayers of transition metal dichalcogenides, interlayer excitons with long recombination lifetime represent the lowest energy optical resonances. In heterostructures created by using different material recombinations and different fabrication methods, interlayer exciton properties are drastically different. I will discuss the observation of multiple interlayer exciton resonances with either positive or negative circularly polarized emission in a MoSe2/WSe2 heterobilayer with a small twist angle created using the mechanical exfoliation and stacking method. We attribute these resonances to the ground state and excited states confined within the moiré potential. I will compare these experiments to those observed in a MoSe2/WSe2 heterobilayer created using the chemical vapor deposition method.

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Presenters

  • Xiaoqin (Elaine) Li

    University of Texas at Austin, University of Texas-Austin, The University of Texas at Austin, Department of Physics and Center for Complex Quantum Systems, Univ of Texas, Austin, Department of Physics, University of Texas at Austin, TX 78712, United States, Univ of Texas, Austin, Department of Physics, The University of Texas at Austin, Department of Physics, The University of Texas at Austin, USA

Authors

  • Xiaoqin (Elaine) Li

    University of Texas at Austin, University of Texas-Austin, The University of Texas at Austin, Department of Physics and Center for Complex Quantum Systems, Univ of Texas, Austin, Department of Physics, University of Texas at Austin, TX 78712, United States, Univ of Texas, Austin, Department of Physics, The University of Texas at Austin, Department of Physics, The University of Texas at Austin, USA