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arXiv · 1908.03247

Biaxial strain tuning of interlayer excitons in bilayer MoS2

Felix Carrascoso·Der-Yuh Lin·Riccardo Frisenda·Andres Castellanos-Gomez
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Abstract

We show how the excitonic features of biaxial MoS2 flakes are very sensitive to biaxial strain. We find a lower bound for the gauge factors of the A exciton and B exciton of (-41 +- 2) meV/% and (-45 +- 2) meV/% respectively, which are larger than those found for single-layer MoS2. Interestingly, the interlayer exciton feature also shifts upon biaxial strain but with a gauge factor that is systematically larger than that found for the A exciton, (-48 +- 4) meV/%. We attribute this larger gauge factor for the interlayer exciton to the strain tunable van der Waals interaction due to the Poisson effect (the interlayer distance changes upon biaxial strain).

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Felix Carrascoso, Der-Yuh Lin, Riccardo Frisenda, Andres Castellanos-Gomez. 2020-06-11. Biaxial strain tuning of interlayer excitons in bilayer MoS2. https://doi.org/10.1088/2515-7639%2Fab4432

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