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Strain_tuning_interlayer_exciton_MoS2_20190809.pdf (2.55 MB)

Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2

submitted on 09.08.2019, 08:56 and posted on 09.08.2019, 15:31 by Felix Carrascoso, Der-Yuh Lin, Riccardo Frisenda, Andres Castellanos-Gomez

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).


ERC-StG 2017 (grant agreement n° 7556)

EU Graphene Flagship funding (Grant Graphene Core 2, 785219)

Spanish Ministry of Economy, Industry and Competitiveness (Juan de la Cierva-formación fellowship 2017 FJCI-2017-32919)

Ministry of Science and Technology of Taiwan (No. MOST 108-2221-E-018-010)


Email Address of Submitting Author


Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC)



ORCID For Submitting Author


Declaration of Conflict of Interest

No conflict of interest