Bandgap engineering of strained monolayer and bilayer MoS2.

  title={Bandgap engineering of strained monolayer and bilayer MoS2.},
  author={Hiram J Conley and Bin Wang and Jed I. Ziegler and Richard F. Haglund and Sokrates T. Pantelides and Kirill I Bolotin},
  journal={Nano letters},
  volume={13 8},
We report the influence of uniaxial tensile mechanical strain in the range 0-2.2% on the phonon spectra and bandstructures of monolayer and bilayer molybdenum disulfide (MoS2) two-dimensional crystals. First, we employ Raman spectroscopy to observe phonon softening with increased strain, breaking the degeneracy in the E' Raman mode of MoS2, and extract a Grüneisen parameter of ~1.06. Second, using photoluminescence spectroscopy we measure a decrease in the optical band gap of MoS2 that is… Expand
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Strain engineering in bilayer WSe2 over a large strain range
  • Naiyun Tang, Chen Du, Qianqian Wang, Haoran Xu
  • Materials Science
  • 2020
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