Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2

09 August 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


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).


2d materials
molybdenum disulfide (MoS2)
interlayer exciton
strain engineering


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