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Simultaneous capturing phonon and electron dynamics in MXenes

Author

Listed:
  • Qi Zhang

    (Chinese Academy of Sciences)

  • Jiebo Li

    (Beihang University)

  • Jiao Wen

    (Beihang University)

  • Wei Li

    (GuSu Laboratory of Materials)

  • Xin Chen

    (GuSu Laboratory of Materials)

  • Yifan Zhang

    (Beihang University)

  • Jingyong Sun

    (Beihang University)

  • Xin Yan

    (Beihang University)

  • Mingjun Hu

    (Beihang University)

  • Guorong Wu

    (Chinese Academy of Sciences)

  • Kaijun Yuan

    (Chinese Academy of Sciences
    Hefei National Laboratory)

  • Hongbo Guo

    (Beihang University)

  • Xueming Yang

    (Chinese Academy of Sciences
    Hefei National Laboratory
    Southern University of Science and Technology)

Abstract

Plasmonic MXenes are of particular interest, because of their unique electron and phonon structures and multiple surface plasmon effects, which are different from traditional plasmonic materials. However, to date, how electronic energy damp to lattice vibrations (phonons) in MXenes has not been unraveled. Here, we employed ultrafast broadband impulsive vibrational spectroscopy to identify the energy damping channels in MXenes (Ti3C2Tx and Mo2CTx). Distinctive from the well-known damping pathways, our results demonstrate a different energy damping channel, in which the Ti3C2Tx plasmonic electron energy transfers to coherent phonons by nonthermal electron mediation after Landau damping, without involving electron-electron scattering. Moreover, electrons are observed to strongly couple with A1g mode (~60 fs, 85–100%) and weakly couple with Eg mode (1–2 ps, 0–15%). Our results provide new insight into the electron-phonon interaction in MXenes, which allows the design of materials enabling efficient manipulation of electron transport and energy conversion.

Suggested Citation

  • Qi Zhang & Jiebo Li & Jiao Wen & Wei Li & Xin Chen & Yifan Zhang & Jingyong Sun & Xin Yan & Mingjun Hu & Guorong Wu & Kaijun Yuan & Hongbo Guo & Xueming Yang, 2022. "Simultaneous capturing phonon and electron dynamics in MXenes," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35605-7
    DOI: 10.1038/s41467-022-35605-7
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    References listed on IDEAS

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    1. Gregory D. Scholes & Graham R. Fleming & Lin X. Chen & Alán Aspuru-Guzik & Andreas Buchleitner & David F. Coker & Gregory S. Engel & Rienk van Grondelle & Akihito Ishizaki & David M. Jonas & Jeff S. L, 2017. "Using coherence to enhance function in chemical and biophysical systems," Nature, Nature, vol. 543(7647), pages 647-656, March.
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    3. Meng Zhou & Chenjie Zeng & Yuxiang Chen & Shuo Zhao & Matthew Y. Sfeir & Manzhou Zhu & Rongchao Jin, 2016. "Evolution from the plasmon to exciton state in ligand-protected atomically precise gold nanoparticles," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
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