Raman Spectroscopy Study of Lattice Vibration and Crystallographic Orientation of Monolayer MoS2 under Uniaxial Strain

Authors

  • Yanlong Wang,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
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  • Chunxiao Cong,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
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  • Caiyu Qiu,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
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  • Ting Yu

    Corresponding author
    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
    2. Department of Physics, Faculty of Science, National University of Singapore, 117542 Singapore, Graphene Research Centre, National University of Singapore, 117546 Singapore
    • Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore.
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Abstract

original image

The false-color (3D type) image of the intensity of the Raman spectra of monolayer MoS2 versus both peak positions and polar angles is plotted. It shows that the strongest E2g1+ and E2g1− peaks appear at different angles, reflected as the alternation of the maxima of the intensity within the frequency range of the E2g1 mode, which is the consequence of the crystallographic orientation relevant to the strain direction as predicted by theoretical analysis.

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