Helicity resolved Raman spectroscopy of mono- and a few-layers thick PtSe$_2$

Isamu Yasuda; Takuya Kawada; Hiroki Matsumoto; Masashi Kawaguchi; Masamitsu Hayashi

doi:10.35848/1882-0786/acd35f

Helicity resolved Raman spectroscopy of mono- and a few-layers thick PtSe$_2$

Mesoscale and Nanoscale Physics 2023-10-27 v1 Materials Science

Authors: Isamu Yasuda , Takuya Kawada , Hiroki Matsumoto , Masashi Kawaguchi , Masamitsu Hayashi

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Abstract

We studied helicity resolved Raman scattering in PtSe $_2$ flakes with different thicknesses. The peak amplitude of helicity-switched Raman scattering is significantly larger than that of helicity-conserved scattering for the in-plane $E_{g}$ mode, consistent with the Raman tensor analyses and conservation law of angular momentum. The peak amplitude of the helicity-switched $E_{g}$ mode is larger for the thinner flakes. In addition, we find Raman peaks near the energy levels of infrared (IR)-active $E_u$ and $A_{2u}$ modes, only for monolayer and a few-layers thick flakes. Interestingly, these peaks manifest themselves only for helicity-switched Raman scattering; they are nearly absent for helicity-conserved scattering.

Keywords

helicity resolved raman ptse2 few-layer flakes eg mode raman tensor angular momentum

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@article{arxiv.2310.17206,
  title  = {Helicity resolved Raman spectroscopy of mono- and a few-layers thick PtSe$_2$},
  author = {Isamu Yasuda and Takuya Kawada and Hiroki Matsumoto and Masashi Kawaguchi and Masamitsu Hayashi},
  journal= {arXiv preprint arXiv:2310.17206},
  year   = {2023}
}

Helicity resolved Raman spectroscopy of mono- and a few-layers thick PtSe$_2$

Abstract

Keywords

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