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Electronic-temperature estimation of Joule-heated graphene via Raman investigations

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Abstract

Temperature-dependent Raman scattering provides valuable information on electron–phonon coupling and phonon anharmonicity of graphene. In this study, we show an enhancement of Joule heating in graphene by confining the current flow in a narrow channel. In addition, we performed a detailed analysis of the anharmonic effect in the hBN/monolayer graphene/hBN heterostructure based on the behaviour of the full-width at half maximum of the G mode with increasing electric power: a non-monotonic trend, leading to the key of approximation of the electronic temperature in graphene. We believe our results could offer a convenient analysis tool to study electron–phonon coupling and anharmonic phonon-decay processes in a high-temperature regime.

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  • 21 January 2021

    The article was revised to change copy right year.

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Acknowledgements

This research was supported by Research Funds of Mokpo National University in 2019.

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Authors and Affiliations

  1. Division of Physical Metrology, Korea Research Institute of Standards and Science, Daejeon, 34113, South Korea

    Minky Seo

  2. Department of Physics, Mokpo National University, Muan, 58554, South Korea

    Do-Hoon Kim & Seok-Kyun Son

  3. Department of Energy Systems Research and Department of Materials Science and Engineering, Ajou University, Suwon, 16499, South Korea

    Jae-Hyun Lee

Authors
  1. Minky Seo
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  2. Do-Hoon Kim
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  3. Jae-Hyun Lee
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  4. Seok-Kyun Son
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Correspondence to Jae-Hyun Lee or Seok-Kyun Son.

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Seo, M., Kim, DH., Lee, JH. et al. Electronic-temperature estimation of Joule-heated graphene via Raman investigations. J. Korean Phys. Soc. 78, 164–168 (2021). https://doi.org/10.1007/s40042-020-00054-2

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  • DOI: https://doi.org/10.1007/s40042-020-00054-2

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