2019/08/31 by Felix Carrascoso, Der-Yuh Lin, Riccardo Frisenda +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1088/2515-7639/ab4432
published as J. Phys. Mater. 3 015003 (2020) · 3 figures in the main text, 14 figures in the Supp. Info
arxiv created 2020/06/11 · arxiv updated 2020/06/15
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).