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    Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect

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    BW13540.pdf
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    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Guo, Jia
    Zhang, Chenhui cc
    Liang, Weizheng
    Zhang, Xixiang cc
    Luo, S. N. cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2021-01-21
    Submitted Date
    2020-09-18
    Permanent link to this record
    http://hdl.handle.net/10754/667086
    
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    Abstract
    Coherent phonon excitation via femtosecond laser pulses can be used to control physical properties of matter, and enhancing coherent phonon excitation is highly relevant. Here, we report the strong enhancement of coherent phonon excitation in Fe3GeTe2 (FGT) via the resonance Raman effect. On the basis of the femtosecond transient optical spectroscopy measurements, the A1g coherent phonon excitation in FGT is obtained as a function of pump photon energy. Its excitation can be maximized by tuning the pump photon energy. The maximum coherent phonon excitation at the 1.574-eV pump photon energy corresponds to an electronic transition in FGT, and is a direct result of the resonance Raman effect. The A1g coherent phonon generation follows the impulsive stimulated Raman scattering mechanism. Our work demonstrates that the resonance Raman effect can be an effective way to enhance coherent phonon excitation via electronic excitation.
    Citation
    Guo, J., Zhang, C., Liang, W., Zhang, X.-X., & Luo, S. N. (2021). Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect. Physical Review B, 103(2). doi:10.1103/physrevb.103.024302
    Sponsors
    This work was sponsored by Southwest Jiaotong University.
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/physrevb.103.024302
    Additional Links
    https://link.aps.org/doi/10.1103/PhysRevB.103.024302
    ae974a485f413a2113503eed53cd6c53
    10.1103/physrevb.103.024302
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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