%0 DATA %A Felix, Carrascoso %A Der-Yuh, Lin %A Riccardo, Frisenda %A Andres, Castellanos-Gomez %D 2019 %T Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2 %U https://chemrxiv.org/articles/Biaxial_Strain_Tuning_of_Interlayer_Excitons_in_Bilayer_MoS2/9423011 %R 10.26434/chemrxiv.9423011.v1 %2 https://chemrxiv.org/ndownloader/files/17043836 %K 2d materials %K molybdenum disulfide (MoS2) %K interlayer exciton %K strain engineering %X

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).