Preprint Article Version 1 This version is not peer-reviewed

Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2

Version 1 : Received: 9 August 2019 / Approved: 12 August 2019 / Online: 12 August 2019 (11:43:12 CEST)

How to cite: Carrascoso, F.; Lin, D.; Frisenda, R.; Castellanos-Gomez, A. Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2. Preprints 2019, 2019080139 (doi: 10.20944/preprints201908.0139.v1). Carrascoso, F.; Lin, D.; Frisenda, R.; Castellanos-Gomez, A. Biaxial Strain Tuning of Interlayer Excitons in Bilayer MoS2. Preprints 2019, 2019080139 (doi: 10.20944/preprints201908.0139.v1).

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).

Subject Areas

2D materials, molybdenum disulfide (MoS2), interlayer exciton, strain engineering, bilayer

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