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Characterizing the dielectric function of SnS on the ab-plane through parameterization

  • Original Paper - Condensed Matter
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Abstract

Since α-SnS has optically strong anisotropic characteristics, a simple method to determine its crystal orientation is strongly needed in device engineering. We report the parameter values ​​of the Tauc–Lorentz model (TL) which can be used to determine the dielectric function (\(\varepsilon = \varepsilon_{1} + i\varepsilon_{2}\)) of α-SnS in the 1–5 eV spectral region with the full azimuthal angle range. The TL model was applied to describe dielectric function data of the SnS reported previously, and the reconstruction was successfully accomplished by eight TL oscillators, showing the asymmetric nature of the dielectric function. Using the interpolation of the obtained parameters, ε can be determined as a continuous function of energy and azimuthal angle within the limits given above. Orientation of the crystal axis of SnS device can be also decided by simple optical measurement.

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Acknowledgements

This research was supported by National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF- 2021R1A2C1005359 and NRF- 2020R1A5A1016518).

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Authors and Affiliations

  1. Department of Physics, Kyung Hee University, Seoul, 02447, Republic of Korea

    Xuan Au Nguyen, Young Dong Kim & Tae Jung Kim

  2. Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi, 100000, Vietnam

    Long Van Le & Hoang Tung Nguyen

  3. Center for Converging Humanities, Kyung Hee University, Seoul, 02447, Republic of Korea

    Tae Jung Kim

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  1. Xuan Au Nguyen
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Correspondence to Young Dong Kim or Tae Jung Kim.

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Nguyen, X.A., Kim, Y.D., Le, L.V. et al. Characterizing the dielectric function of SnS on the ab-plane through parameterization. J. Korean Phys. Soc. (2024). https://doi.org/10.1007/s40042-024-01057-z

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  • DOI: https://doi.org/10.1007/s40042-024-01057-z

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